Category Archives: Photography

Doublets and Triplets

We’ve turned the corner and finally see a change in season. This is true regarding the weather as well as the occupancy here at Viewpoint Golf and RV Resort. The last time the thermometer hit 100 degrees was October 21st – we haven’t been in the 90s since the 22nd of October. Daily highs range from the low to mid 80s.

The seasonal visitors (Snowbirds) from the north have arrived and the park is nearly full. This is really evident on the pickleball courts and the golf course. I haven’t started my pickleball coaching sessions for this winter yet, the pickleball courts will close for resurfacing next week. Unfortunately, the summer temperatures are too high for the surface to cure properly, so they’ll be doing the work now while demand for courts is high.

Donna convinced me to take up tennis. I started beginner tennis lessons last week and I’m hooked already. I’ve long been a fan of professional tennis and have been watching all of the major professional tournaments on TV since the days of Jimmy Connors and Bjorn Borg – that’s a long time ago! It’s not an easy game to learn, but I think taking lessons and getting my form and technique right from the start is the way to go. We have nine tennis courts here at Viewpoint and the tennis club is very active and well organized.

Donna is now playing tennis at the 3.0 level and plays in league tournaments. The league tournaments are played against teams from other parks in the area such as Leisure World and Mesa Regal. She’s playing really well and having a lot of fun.

Learning a new sport at the age of 67 is challenging. Pickleball skills don’t really transfer to tennis – it’s a new ball game for me. I’m looking forward to learning and with any luck I’ll be playing recreational tennis with the club within a few months.

I haven’t been out for any astrophotography sessions since I captured the Eastern Veil – see my last post. I avoided the full moon period and we had a few nights with high, thin clouds. I picked up a new telescope though. Telescopes, refractors to be more precise, come in a few flavors and design choices affect how suitable they are for certain tasks.

For astrophotography, these choices can be critical, as photos will show aberrations that we may not notice so much when observing through an eyepiece. One of the first considerations is the type of optical glass used – this can have a huge effect on the amount of apparent chromatic aberration (false color). There are trade-offs as each choice is a compromise. Most astronomers agree that a lens ground from fluorite crystal is the best. But it is very difficult to work with and very expensive.

A few companies have developed synthetic crystals that can rival natural flourite. The most popular is made by Ohara – a Japanese company – and it’s called FPL53. There are a few others, but FPL53 is the benchmark. They make another optical glass that’s slightly inferior when tested for chromatic aberration called FPL51. This glass is lower priced than FPL53 and relatively easy to grind and figure.

The two most popular designs for refractor telescopes are called doublets and triplets. As the name implies, a doublet had a lens cell utilizing two elements. To make a high-quality doublet, you must start with high-quality lens material to combat chromatic aberration and very precise grinding and figuring to reduce any spherical aberration.

The triplet has a lens cell with three elements. By grinding and figuring three lens, the optician has more design freedom on how the elements will interact and these designs are inherently superior to doublets. However, they are more costly and also heavier. Some great telescope designers and manufacturers such as Roland Christen of Astro-Physics claim they can make a doublet that equals a triplet in image quality, however it is more difficult and time consuming to achieve this.

I’ve explained all that to give some background on my new telescope. My first refractor was a William Optics ZenithStar 73III – a doublet made with excellent FPL53 glass. I loved that telescope and I started my astrophotography journey with it. WIlliam Optics has a great reputation for quality and customer service. Last month, I saw a special offer from Agena Astro – my go-to online retailer for all things astronomy-wise.

They offered the William Optics Grand Turismo 71 with a 0.8X reducer/field flattener and a William Optics guidescope for an unbelievable package price. The GT71 is similar to my Z73, but it’s a triplet made with FPL53 and people rave about it. I placed the order and listed my Z73 for sale. I sold the Z73 within a week and parlayed the cash into the GT71. I haven’t used it yet, but I know it’ll be great.

Externally the Z73 and GT71 look very similar. But, we know the triplet with FPL53 should handily outperform a doublet with the same material. The field flattener converts a telescope into an astrograph suitable for astrophotography. Without it, the image would have something known as field curvature which distorts the outer edges and corners of the image – stars would look like footballs or pear-shaped for example.

William Optics Gran Turismo 71 – 0.8X reducer/flattener mounted on the end of the scope

My Z73 had a 1.0X field flattener, meaning it corrected field curvature without changing any other aspect of the scope. My new GT71 has a 0.8X reducer/flattener. This not only corrects the field curvature, but through the magic of optical design, it reduces the effective focal length and changes the focal ratio – you end up with a wider field of view and a faster scope – a faster scope collects light more quickly than a slower scope and can capture images in less time. All three of my telescopes are equipped with field flatteners – a 1.0X on the APM 140 and a 0.8X on the AT 115EDT. I also have a 1.0X for the AT 115EDT.

I’m planning to try a capture of Jupiter tonight. I have to reconfigure the APM 140 for planetary work. I haven’t shot a planetary or lunar image in nearly a year. I have to wrap my head around the different requirements and software for this – it’s much different than capturing a Deep Sky Object.

My legs are a little sore and fatigued this morning. Not only did I have tennis lessons on Wednesday and Friday, on Thursday Donna and I practiced on the tennis court for an hour and Friday morning I spent an hour hiking through the riparian preserve.

As we head toward winter, more migratory birds are in the area. I also found many more people at the riparian preserve than a couple of months ago when it was still hot outside.

I shot a few bird images – that was the reason for hiking through the riparian preserve.

Black-crowned Night Heron – I like how the out-of-focus leaves in the foreground create a natural vignette
American White Pelican
Mockingbird
Bendire’s Thrasher

Last week I found USDA Prime tri-tip at Costco. Tri-tip is one of my favorite cuts of beef – I wrote about it here and here. I smoked it on the Traeger and Donna served it with jalapeno corn bread (made with jalapenos from her garden), green beans and sweet potato pierogies. Delicious!

Tri-tip dinner plate

As I mentioned, we’ve reached the time of year when cooler weather prevails. The forecast for the next couple of weeks calls for highs in the mid-70s to mid-80s with a chance of rain late next week. By the end of the month, we may have highs in the upper 60s – chilly by Valley of the Sun standards.

Cigars and Stars

Another month has flown by – we’re only a week away from Halloween! October began with Donna taking a trip to Bennington, Vermont to visit her parents. I drove Donna to the airport in the early morning of Tuesday, October 3rd. I had time after dropping her off for a quick breakfast and coffee before sunrise. Then I packed my photography gear and headed over to the Riparian Preserve in Gilbert. The first hour or so after sunrise usually has great light for photography.

I shot a few bird photos that I thought were nice. This hummingbird is puffed up, warming herself in the sunrise.

Female hummingbird

I shot a sequence of a snowy egret skimming the water and capturing a fish for breakfast.

The third photo of the sequence above shows the nice early morning light on the back of the egret’s wings. I also captured an image of cormorants in flight.

The cormorants are flying toward the sunrise and the light on their underside is very nice.

The glassy water reflects the image of these black-neck stilts.

Black-neck stilts

I also liked the simple composition of this black phoebe photo.

Black phoebe

Friday, October 6th was my birthday. Donna was away, but she left me a card with a gift certificate for RJ’s Cigars. This was just right as I planned to go to RJ’s Cigar Lounge and enjoy a top-shelf cigar for my birthday. I also want to give a shout out and thank you to long-time blog follower, Miriam Armbrester. Miriam sent me a birthday card. I really appreciate the fact that she took the time to select a card and send it to me in the mail. We met Miriam and her husband, Rand, when we were in Alabama in 2018. They treated us to lunch at the oldest restaurant in Alabama – I wrote about it here.

Donna came back from Vermont on Sunday, October 8th. During the month of October and into November, many of the winter snowbirds return to Viewpoint. Residents of the northern states and Canada return as the weather here cools and becomes downright cold in the areas they summer in. We’ve had slightly cooler weather with a few exceptions where we had very warm afternoons. The evenings are pleasant and overnights are much cooler now.

My last attempt at astrophotography was on our trip to our housesit in Cortez, Colorado. I was foiled by clouds there. The summer months of July through September were too hot here for astrophotography. Here’s the thing – I use dedicated astrophotogrphy cameras for deep sky objects. These cameras have electronically cooled sensors to capture the image.

Deep sky objects are so dim and so far away that long exposure times are necessary. If the image sensor gets too hot, it creates noise – that is, random pixels will glow in uncontrolled ways, making the image appear grainy and lack clarity. For deep sky photography, I like to maintain the sensor temperature at zero degrees Celsius (32 degrees Fahrenheit). My best camera is able to cool the sensor 35 degrees Celsius below the ambient temperature – others are capable of cooling 30 degrees Celsius below ambient.

In the summer here, it’s not uncommon for the ambient temperature to remain above 90 degrees (about 30 degrees Celsius) well after dark. This would mean my camera’s cooling system would have to run at 100% output continuously to try and cool the sensor enough. I don’t like to run it above 50% and once cool, it should maintain the temperature with about 25% output. Thus, I give up astrophotography here in the summer. I could photograph planets or the moon. These are such bright objects, they can be captured with very short exposures and do not need cooling. But I find it hard to motivate myself to set up my gear when it’s hot outside and doesn’t get dark until after 9pm.

Lately, the temperature has been dropping to around 80 degrees shortly after sunset. I still have some new gear that I bought earlier this summer, but haven’t been able to try out. While Donna was away, I set up here at the Northpoint Recreation Center in the Viewpoint Resort. I used my Player One Poseidon astro-camera for the first time. I had some technical difficulties the first night and had to give up. I went back out on October 4th and captured just short of three hours of usable 75 second sub-exposures. This is the Andromeda Galaxy, one of the first deep sky targets I attempted when I got into this hobby about 10 months ago. This is an improvement over my earlier attempt, but it needs more time to reveal the detail.

Andromeda Galaxy (M31)

Although this galaxy is over two million light years away from earth, it’s the closest galaxy to our own Milky Way galaxy.

I mentioned technical difficulties – they hit again the next time I went out. I was very frustrated and finally figured the laptop I was using, which was a refurbished unit I bought on Amazon had signs of impending hard drive failure. I bit the bullet and went to Best Buy and bought a better laptop with a 1TB solid state drive.

Unfortunately, the new laptop was loaded with Windows 11 – the old one was Windows 10. Most of the astrophotography open source (free) software I use was developed for Windows 10. I had to download all of the software programs and reconfigure everything. Some software, NINA for example, had to have new paths configured to communicate with other needed programs. NINA manages my session, communicating with as many as four other programs simultaneously. I’m not that computer savvy and it took a lot frustrating trial and error to get it working.

I’ve wanted to capture an image of the Eastern Veil Nebula for a while – it was to be my target when we were in Cortez, Colorado. It’s getting a little late in the year, but I went for it. My first session was full of technical issues that resulted in only 76 minutes of usable data.

After finally getting all of my gear and software to play nice, I added two more sessions for a total time of four hours and 23 minutes. This produced a nicely detailed view with vibrant, saturated color. The red areas are hydrogen gas and the blue is oxygen.

Eastern Veil Nebula (NGC6992)

The Eastern Veil Nebula is located in the constellation Cygnus. It’s part of a large supernova complex called the Cynus Loop. The entire loop is quite large with distinct areas of gas created when a large star (20 times the size of our sun) died. When stars die (supernova) the outer areas explode away from the core creating these vast clouds of gas, while the core implodes into a high density mass that may become a black hole.

In the photo above, you can see traces of hydrogen throughout, leaving a reddish cast. I might try to capture more of the Cynus Loop – the Western Veil and Pickering’s Triangle.

With Donna back home again, I’ve enjoyed some gourmet dinners. First I’ll share the sheet-pan chicken with shallots and grapes. Served over spaghetti squash, it was an interesting and delicious dish.

Sheet-pan chicken with shallots and grapes

Another goody was creamy scallops with fresh tomatoes.

Creamy scallops with fresh tomatoes and steamed spinach on the side

Although the thermometer flirted with 100 degrees last week, the week ahead and into November calls for highs in the low 80s and eventually down to the 70s. Looking forward to that!

San Diego Housesit

My last post mentioned my desire to get back into terrestial photography in addition to my astrophotography hobby. I’m particularly interested in bird and wildlife photography. I put together a modest kit with a Canon R7 camera body and a few lenses – most useful are the 100-400mm zoom and a 600mm prime lens.

I didn’t go all out on professional level Canon “L” glass – the costs are prohibitive. The consumer-grade Canon lens has advantages and disadvantages. The advantages include, obviously, lower cost. They are also compact and lighter weight. The main disadvantage is the smaller maximum aperture, resulting in slower lens speed – meaning they can’t gather as much light as a faster lens. This is a problem in lower light with fast moving subjects. The “L” lens line generally has better autofocus capability and image stabilization. That’s not to say the consumer-grade line up has “bad” autofocus and image stabilization – it’s pretty amazing in fact.

My first bird photo opportunity came right in our backyard – the fifth hole of the Viewpoint Executive nine-hole golf course. There’s an established breeding colony of non-native Lovebirds here. Donna and I found them in a palm tree.

Rosy-faced Lovebirds

We had a housesit lined up for September 18th through the 27th in San Diego. I knew there would be many opportunities in San DIego for bird photography, especially shore birds. I started practicing my skills before we went there by visiting the Gilbert Riparian Preserve – it’s about 10 miles away from our place at Viewpoint in Mesa.

The riparian preserve is located in east Gilbert on 110 acres of land. Of the 110 acres, 70 are covered by a series of seven ponds (water recharge basins). It’s mostly wooded with several trails throughout the preserve. Many common shore birds such as egrets and herons as well as waterfowl and osprey can be found there. The woods are home to many other species of birds.

Female adult Great-tailed Grackle

While confirming the identity of some birds, I found a curious fact. Some bird names have changed over the years. I remembered Great-tailed grackles as Boat-tail Grackles. I checked my old copy of Peterson’s Field Guide to Western Birds and sure enough, it’s called a Boat-Tail grackle. My new copy of Peterson Field Guide to Birds of Western North America lists the same bird as a Great-Tailed Grackle.

Snowy Egret
Great Egret

Note the black bill and yellow feet on the Snowy Egret while the Great Egret has the opposite – yellow bill and black feet.

Hummingbird in the woods
Osprey – sometimes called a Fish Hawk
Green Heron nabbing a small fish
Swallowed it in one gulp

The homeowner in San Diego asked us to arrive there between 3pm and 4pm. We left Mesa, Arizona at 8am to allow plenty of time to make the 400-mile drive to San Diego. I stopped in Yuma, Arizona to fill our gas tank. Regular unleaded gasoline was $4.14/gallon there. Crossing the Colorado River and entering California, the fuel prices were nearly $2/gallon higher!

California gas cash price at Speedway – the prices were rising during our stay

We arrived at our destination in the Clairemont neighborhood right at 3pm. After spending an hour or so getting familiar with the home and Sadie, their German Shepard, we found out the homeowner wasn’t leaving for the airport until 8pm. We drove down to Mission Bay and parked outside of the Mission Bay RV Resort to look around and kill some time. We used to spend the fall here when we were full-time RVers. The place has really changed.

All of the old park model homes have been removed. The clubhouse is still there and now the swimming pool is open to RVers staying in the park. The park is no longer secured – walking and biking paths through the RV park are open to the public. I would be very concerned about theft in the RV park nowadays – it was bad enough when it was all gated and patrolled.

Donna and I hiked around the point defining De Anza Cove and I photographed a few birds.

Great Blue Heron

I found a shorebird I didn’t recognize on the south side of the point and shot a few frames.

Mystery bird

I uploaded the image into Google Images and it came back with a match to a Reddish Egret. I did a search and found these are fairly rare in southern California – only three or four are reported each year and fewer are documented with photographs. I contacted the San Diego Audobon Society and they asked for photos. I sent them the files. They got back to me and told me I had mis-identified the bird. It wasn’t a Reddish Egret, it was a Little Blue Heron and they were pretty excited about it. Finding one on the west coast north of Mexico is extremely rare and I had it documented! The coloration of the bill positively identified it – I should have caught that.

The next day, we drove up to La Jolla and walked around the La Jolla Cove. I called it a target-rich environment. There are many bird and mammals that are easily accessible there. Pelicans are ubiquitous.

California Brown Pelican coming in for a water landing

The Children’s Pool area is over-run with sea lions and seals.

The old man presiding over snoozing sea lion pups
This sea lion pup is napping with one eye open
Gull in flight

I had plenty of opportunities to practice capturing birds in flight.

Later that evening, we returned to La Jolla after taking care of Sadie, to join Donna’s sister, Sheila and Jeff for dinner and had a nice night. Donna walked Sadie two or three times each day while we were there.

The next morning, I drove to the San Diego River estuary along old Sea World Drive. The lighting conditions each morning were challenging. There was a marine layer overcast – while that provided a diffuse light source with minimal shadows, it also limited the brightness. I found a couple of interesting birds along with more egrets. In hindsight, I wish I would have switched to my 600mm lens, but I stuck with the faster 100-400mm zoom.

Adult female Belted Kingfisher

As I was loading my gear in the car, I spotted a large raptor in the sky headed in my direction. It landed at the top of a pine tree next to the road. I quickly got my camera out of the car and grabbed a few shots. Right away, I thought “Marsh Hawk.”

Once again, Google Images told me I had it wrong. It was identified as a Northern Harrier. I couldn’t find a Marsh Hawk image. After searching further on the internet, I found the Northern Harriers were formerly called Marsh Hawks! Fooled by another name change.

On Friday afternoon, we met up with my high school buddies, Gary Stemple and John Barrientez at the Riverwalk golf course in Mission Valley. I don’t think I mentioned the house where we were house-sitting was located less than a mile away from Clairemont High School and Marston Junior High where I went to school in the early ’70s.

Gary, Donna and John at Riverwalk golf course

I rode along for the first nine holes, then headed back to attend to Sadie. This was a tough golf course with some long 500 yard+ holes with the San Diego River crossing some fairways. It took them about five hours for 18 holes.

We had a couple of dinners at my old watering hole, Offshore Tavern and Grill where we met up with some of the old crowd and had our favorite dinners of poke and seared ahi. We met up with Mona Sojot one night – it was great to see her again and see how well she’s doing. Donna also met with Sini one night for a walk at Mission Bay and dinner at Offshore.

We played pickleball one afternoon as guests of Sheila and Jeff at the private San Diego Tennis Racquet Club. We played four games and it was enjoyable, although I was a bit rusty. I’ll be giving pickleball lessons over the winter here at Viewpoint again.

We made two more morning hikes to photograph birds. We went to Cabrillo National Monument and drove down to the Point Loma tide pools. I caught a couple of shots of pelicans surfing. That’s what I call it when a pelican glides on the column of air being pushed along as a wave comes ashore. They glide close to the water’s surface for long distances this way.

Pelican surfing
A squadron of brown pelicans heading my way
Cormorant
Cabrillo Historic lighthouse – viewed from below at the tide pools near the new Point Loma lighthouse
House Sparrow on a pier on Shelter Island
A pelican splashes down after diving 40 feet though the air to capture a fish

Our last birding stop was a morning hike through Tecolote Canyon. I found a few interesting subjects to photograph there.

California Thrasher
Mannekin in Tecolote Canyon – non-native but well established in San Diego
Woodpecker
California Ground Squirrel

I’m working with new (to me) software to “develop” and process my images. It’s different from astrophotography image processing. I’m mainly using a program called DarkTable which is very powerful, but I’m finding it complicated. My images out of the camera aren’t bad, but as my processing skill improves, I expect better results.

We drove home uneventfully on Wednesday, September 27th. We made our usual stop at Dateland and bought date shakes and Donna picked up a few packages of dates. We hit some traffic as we neared Mesa as the evening rush hour was in full swing.

No dinner plates this time. It looks like we’ve finally beat the heat as the forecast is calling for cooler tempertures with the highs in the 80s and 90s for the week ahead.