What's this giant light in the sky
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What's this giant light in the sky
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Topic: What's this giant light in the sky (Read 847 times))
DMR214
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Real Name: Rick
Re: What's this giant light in the sky
«
Reply #20 on:
September 17, 2021, 01:51:07 AM »
Defenitley some great photos.
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rsterne
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Bob and Lloyd
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Re: What's this giant light in the sky
«
Reply #21 on:
September 17, 2021, 02:19:18 PM »
Unfortunately I mislaid the images years ago, but I took some fabulous photos of the moon with a Bushnell Spacemaster spotting scope.... I had the "eyepiece projection" attachment for it that projected the image directly on the film of a 35mm Canon camera.... You mounted the camera body directly on the attachment, without a camera lense, the telescope became the lense.... I set the magnification until the image of the moon filled the height of the 24 x 36 mm negative (ie about 20-22mm diameter image).... For a shutter I hung my cap over the objective lense, opened the camera shutter, lifted the cap off, waited a moment for the camera and tripod to settle down, and then whipped the cap out of the way for a couple of seconds, then replaced it and closed the shutter on the camera.... That eliminated the shake of the focal plane shutter.... This is called a "Hat Trick" in astrophotography.... It is useful for exposures longer than about 1 second....
I was using Ilford XP-1, a black and white film that used a single layer of colour film technology, and hence was extremely fine (almost non-existent) grain.... It was originally developed in England during WW2 for aerial reconnassance.... It was nominally 400 ASA, and I developed it with the Ilford chemicals, although you could also use Kodak colour chemicals, but the negatives ended up sepia toned instead of grey.... The photo I had with the best resolution showed craters down to 6 miles across (according to a moon atlas) when printed at 8x10, which was pushing the resolving limit for a 60mm lense.... I was pretty proud of them at the time (early 1980's), I sure wish I still had them....
One thing that was pretty interesting was to always use the same magnification and take photos of the moon at different points in its orbit.... Since it is quite a bit closer to the Earth at Perigee, the image on the film was noticeably larger than at Apogee.... Here is the image size comparison, from EarthSky.org....
When we have a full moon at Perigee, that is what they now call a "Supermoon"....
Bob
«
Last Edit: September 17, 2021, 02:22:20 PM by rsterne
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Coalmont, BC, Canada
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Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
mobilehomer
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Re: What's this giant light in the sky
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Reply #22 on:
September 17, 2021, 03:20:53 PM »
Why has no one posted this?
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DMR214
Sharp Shooter
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Real Name: Rick
Re: What's this giant light in the sky
«
Reply #23 on:
September 18, 2021, 02:48:22 PM »
Have you ever seen a red super moon. I could swear I did when I was a kid and I won't ever forget how huge it looked and I wished I had any kind of camera, even disposable. Lol batman.
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rsterne
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Bob and Lloyd
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Re: What's this giant light in the sky
«
Reply #24 on:
September 18, 2021, 06:39:47 PM »
Likely a partial Lunar eclipse caused the red colour....
Bob
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Coalmont, BC, Canada
🇺🇦
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since! 🇺🇦
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).
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What's this giant light in the sky