Tag Archives: digital

Worldwide Pinhole Photography Day 2020 (backup and backup-backup)

For 2020, I’m doing an extremely-long-exposure photograph or solargraph. The Worldwide Pinhole Photography Day rules are that the photograph must be taken “on the day annually designated as Worldwide Pinhole Photography Day ( April 26, 2020 )” or “Extremely long exposures will be accepted if any part of the exposure was made on Worldwide Pinhole Photography Day…”

I started the exposure on 1 May 2019 and I want to do a full year. That means if the exposure is a bust, I’ve missed WPPD and I’ve got nothing.

So… I decided to make another pinhole camera and use a scanner. I used a USB powered Canon LIDE 30 as a digital back and VueScan and TWAIN-SANE software. The results are not a supreme victory but first, the camera.

JPEG from a PDF page print from http://mrpinhole.com/. I used 8×10 inches as the portion of the 8.5×11″ scanner in case I had to resort to paper. The 16″ film dimension is insurance and a trade off to get the specs I wanted.

I wanted to keep exposure simple and let in a lot of light so I chose a 1mm pinhole and a 10 inch (254mm) focal length to get f/256-ish, a nice power of 2.

I wanted to keep exposure simple and let in a lot of light so I chose a 1mm pinhole and a 10 inch (254mm) focal length to get f/256-ish, a nice power of 2.


It's big so the image won't be super sharp but the pinhole came out pretty well.

It’s big so the image won’t be super sharp but the pinhole came out pretty well.


Foamboard is versatile stuff.

Foamboard is versatile stuff.


I had to actually think about how to get the required sizes from a 20x30" piece. The horror!

I had to actually think about how to get the required sizes from a 20×30″ piece. The horror!


Hot glue is wonderful stuff. Too bad I didn't account for the thickness in the construction calculations (had to fudge a bit).

Hot glue is wonderful stuff. Too bad I didn’t account for the thickness in the construction calculations (had to fudge a bit).


I made it too tall on purpose but the 1st rough cut is fugly.

I made it too tall on purpose but the 1st rough cut is fugly.


It sanded up rather nicely.

It sanded up rather nicely.


Pinhole mount coming along.

Pinhole mount coming along.


Pinhole READY TO ROCK! Too much? Anyway, I'm excited.

Pinhole READY TO ROCK! Too much? Anyway, I’m excited.


Black construction paper to fill in the gaps.

Black construction paper to fill in the gaps.


The assembled beast.

The assembled beast.


Sadly, in the short term, it was not to be. I got something, but nothing to write home about.

Tree in the back yard.

Tree in the back yard.


Different scan settings. Tree in the back yard.

Different scan settings. Tree in the back yard.


I’m not completely ignorant about exposure. Something is going on with the scanner. I even tried an emergency, 1/2 the focal distance (f/128-ish) cardboard box.

Maybe this will help.

Maybe this will help.


Not happy with the results, I had to implement plan C. I replaced the scanner with print paper.

The super-complex, 8x10 print paper taped to a piece of foam board version.

The super-complex, 8×10 print paper taped to a piece of foam board version.


The result is pretty sweet. I’m not insane (about this any way) and the camera works well.

Tree in the back yard. Inexpensive Arista photo paper negative. Metered for ISO 6 at f/256.

Tree in the back yard. Inexpensive Arista photo paper negative. Metered for ISO 6 at f/256.

I’m up late and it’s actually May 1st. At about 3:00 PM local time I’ll cover the shutter and find out if the long exposure worked.

52 Cameras: Apple QuickTake 200 Viewfinder Parallax

A YouTube viewer asked about the parallax error when using the clip-on optical viewfinder. I did a quick & dirty experiment to find out. Original Quicktake 200 post is here.

The 3 focus ranges are 9-13cm for close-up, 45-90cm for portrait, & 90cm-infinity for landscape. The manual says, “IMPORTANT Do not use the close-up focus when you use the viewfinder. It is not accurate.” I didn’t bother with the close up setting but the next worst parallax would be the nearest focus of the portrait setting. The manual also says, “Estimate the focal distance from the front surface of the LCD screen to the object being photographed.” The LCD is on the back so I guess they mean its surface.

I put this on the wall in the kitchen.

Sometimes, science is ugly.

Sometimes, science is ugly.


I put the camera on a small tripod, and measured the distance to the wall so the LCD was 45cm away. I looked as straight through the viewfinder as I could and held still while M slid her finger along the ruler toward the center until I could see it. We repeated that for left, right, top, and bottom. The measurements are just relative to each other, not meaningful in themselves.

Left: 29cm, Right: 67cm, Top: 10cm, Bottom: 37cm

Next, I snapped a picture with the camera in the same place. Ignore the date & time – I didn’t set the camera’s clock.

I used composite out to the old TV instead of digging out the old laptop and Smartmedia floppy adapter.

I used composite out to the old TV instead of digging out the old laptop and Smartmedia floppy adapter.


The image captured these measurements.

Left: 28cm, Right: 60cm, Top: 13cm, Bottom: 38cm

I was a little off reading the ruler. This diagram shows the relationship of the viewfinder view and the sensor image.

Pretty wide angle and not too bad for a cheap plastic clip-on viewfinder.

Pretty wide angle and not too bad for a cheap plastic clip-on viewfinder.

52 Cameras: Nikon Coolpix L310


Nikon still has the manual here.



A photo that was on the SD card when I got the camera.
 The previous owner had a lot of bird images.

The previous owner had a lot of bird images.


I’ll do a separate “Phound Photos” post. The card had images from 14 Dec 2012 to 11 Jul 2013.

McPigeons in Bernalillo, NM.

McPigeons in Bernalillo, NM.


Goober.

Goober.


Storm over the Jemez Mountains.

Storm over the Jemez Mountains.


Not a scene mode but it has settings for B&W, sepia, cyanotype, & vivid.

Not a scene mode but it has settings for B&W, sepia, cyanotype, & vivid.


Doorbell & shadow.

Doorbell & shadow.

Mercury Transiting the Sun 11 November 2019

It was super windy and the old 400mm definitely does not have image stabilization. I got lucky during a short lull.

Sony A7, Aperture Priority, 1/60 second, Fotodiox FD-E adapter, Prospec 400mm (FD) @ f8, Vivitar 2X Teleconverter

Sony A7, Aperture Priority, 1/60 second, Fotodiox FD-E adapter, Prospec 400mm (FD) @ f8, Vivitar 2X Teleconverter


The teleconverter loses 2 stops plus the filter material I had left over from the eclipse. Mercury is at about 1:00. Not great but comparable to the live stream from the Griffith Observatory. I may be alive the next time it’s visible from North America but who knows? Best to grab it while I can.

52 Cameras: #187 – Canon PowerShot G10

Things I missed or glossed over in the video:

Canon still has the manual.

Scene modes: Portrait – “soft effect”, Landscape – deep DoF, Night Scene – slow shutter + flash, Sports – continuous shooting with AF, Night Snapshot – reduces camera shake (boosts ISO & shutter?), Kids & Pets, Indoor, Sunset, Foliage, Snow, Beach, Fireworks, Aquarium, Underwater, ISO 3200 (2X normal highest), and Color Swap.

Metering modes: Evaluative, Center weighted average, Spot AE Point/Center – spot metering is whatever is in the center of the LCD, and Spot AE Point/AF Point – AE point follows AF point (only works with FlexiZone AF selected).



No exposure modifications except the bird photo.
Some crops. For a P&S, it tolerates crops pretty well.

Jem doing what cats do.

Jem doing what cats do.


Open house at New Mexico Wildlife Center was awesome. It’s not on their web site yet but they have a “photographer’s day” coming up in November.
Lightened a little to bring the bird's face out of shadow.

Lightened a little to bring the bird’s face out of shadow.


Another shot of Joni. She touches a tennis ball on a stick & gets a treat.

Another shot of Joni. She touches a tennis ball on a stick & gets a treat.


Sunflowers at the co-op in Santa Fe.

Sunflowers at the co-op in Santa Fe.


I compost most things but goatheads get the flame.

I compost most things but goatheads get the flame.


An example of the exposure compensation. This is 0.

An example of the exposure compensation. This is 0.


This one is - 1/3 stop.

This one is – 1/3 stop.

52 Cameras: # 170 — Sony DSC-H7


I glossed over a lot of the features, face detect, in-camera effects like sepia and saturation, exposure compensation besides bracketing, etc. Even Sony divided the information into a setup guide, instruction manual, and handbook — probably 250 pages worth.



Phound Photos Volume 9 has some of the found images from the memory stick.


18 Jan 2019 - I used GIMP to fix the perspective & adjusted the levels.  The deep shadows fooled the meter.

18 Jan 2019 – I used GIMP to fix the perspective & adjusted the levels. The deep shadows fooled the meter.


21 Jan 2019 - Waiting for moonrise.  The camera biffed the white balance (WB) but GIMP fixed it up.

21 Jan 2019 – Waiting for moonrise. The camera biffed the white balance (WB) but GIMP fixed it up.


28 Jan 2019 - M at Plaza Cafe.

28 Jan 2019 – M at Plaza Cafe.


10 Apr 2019 - Macro is hard in high wind.  The camera did a great job during a rare lull.

10 Apr 2019 – Macro is hard in high wind. The camera did a great job during a rare lull.


10 Apr 2019 - Lupines (I think) in the yard.  Bokeh's not great but not bad.

10 Apr 2019 – Lupines (I think) in the yard. Bokeh’s not great but not bad.


10 Apr 2019 -  Shot through a filthy window at max zoom (78/465mm equiv). I tweaked WB & shadows.

10 Apr 2019 – Shot through a filthy window at max zoom (78/465mm equiv). I tweaked WB & shadows.

Phound Photos Volume 11

I recently acquired an old Canon Digital Rebel. I don’t have a charger yet so I haven’t used it but it has a CompactFlash card in it with images from July 2013 to August 2015.

Whoever the photographer is, I hope she sticks with it.

Probably San Diego based on a ship in another image.

Probably San Diego based on a ship in another image.


Nice macro.

Nice macro.


A person of discerning taste I see.

A person of discerning taste I see.

Christmas ornament selfie with festive nails.

Christmas ornament selfie with festive nails.


Out of focus but this is a cool shot.

Out of focus but this is a cool shot.

Phound Photos Volume 9

These were on the memory card of a Sony DSC-H7. I’ll review the camera shortly since I know I can power it up and get things off of it. I scored the camera from Goodwill Central Coast in Salinas, CA.

There were 350 images total on the card, from June 2011 to November 2012. As usual, when I review the camera, I’ll link to this page so if the people run across the blog or YouTube channel, they can get their pictures.

They have a bird.

They have a bird.


And a water dog.

And a water dog.


Who also likes to hike.

Who also likes to hike.


Sometimes the dog hikes with mom.

Sometimes the dog hikes with mom.


Dr Mycology makes a determination.

Dr Mycology makes a determination.


I think that's Mt. Ranier.

I think that’s Mt. Ranier.


Yep, that's Ranier.

Yep, that’s Ranier.


I love the light in this one.

I love the light in this one.


It still feels weird posting other people’s images. Really old ones are easier. So far I’ve been lucky. No Jimmy Hoffa or Loch Ness monster but also no porn or wrecks or other creepy stuff. Maybe someday I’ll actually reunite someone with pictures they thought were lost forever.

Super Blood Wolf Moon — 20 January 2019

“Super” because the moon is close. “Blood” because of the eclipse. “Wolf” just because the January full moon is called a wolf moon. Some icy clouds so I wasn’t too optimistic but it turned out OK. The clock on my camera was about 20 minutes fast so the image time stamps are a little off. Images are shrunk to 1024 on the long side. Most with the Canon 60D & Sigma 18-250mm.

Moonrise over the Sangre de Cristos.

Moonrise over the Sangre de Cristos.


Icy clouds are beautiful but not great for astrophotography.

Icy clouds are beautiful but not great for astrophotography.


No eclipse yet but the clouds cleared for a while.

No eclipse yet but the clouds cleared for a while.


Near the beginning of the eclipse.

Near the beginning of the eclipse.


Here’s a good example of “crop factor” based on sensor size.The above image was taken with a Canon 60D, which has an APS-C sensor, and a 250mm lens. Because the sensor is smaller than a frame of 35mm film (“full frame”), the angle of view is narrower. For Canon APS-C, the factor is 1.6. You don’t magically get a longer zoom but the field of view is equivalent to the length of the lens times the crop factor. In this case, 250mm X 1.6 = 400mm.

Sony A7 (full frame) and an old Canon FD mount Kiron 400mm telephoto.

Sony A7 (full frame) and an old Canon FD mount Kiron 400mm telephoto.


Both images were resized to 1024 but no cropping. The size of the moon is the same for full frame at 400mm and an APS-C sensor at 250mm.

Back to the moon…

Nearing totality.

Nearing totality.


I switched from aperture priority to manual.  The moon sliver is too small for the spot meter in the camera.

I switched from aperture priority to manual. The moon sliver is too small for the spot meter in the camera.


Still exposing for the sliver so the moon isn't a white blob.

Still exposing for the sliver so the moon isn’t a white blob.


Going... This is a full second at ISO 400 & f/6.3 (as wide as the lens goes at 250mm).

Going… This is a full second at ISO 400 & f/6.3 (as wide as the lens goes at 250mm).


Going... This is about a minute later. They kinda look the same but I was stoked about how they were coming out.

Going… This is about a minute later. They kinda look the same but I was stoked about how they were coming out.


Still going...

Still going…


Houston, we have totality!

Houston, we have totality!


I tried a Canon 2X teleconverter with the Kiron lens on the Sony for a total of 800mm.
800mm

800mm


I even tried a Kiron 2x converter stacked with the Canon 2X converter and the 400mm lens. It worked but the loss of light from the converters, the not-quite-perfect alignment of the converters+lens, and wobbliness of trying to aim something that long on a small tripod (while freezing) wasn’t worth it. The black spot is dust I got on the sensor while dorking around with converters with numb hands. You can see green chromatic aberration at the top of the moon.
2X + 2X + 400mm = 1600mm of wobbly goodness.

2X + 2X + 400mm = 1600mm of wobbly goodness.