Ultra Long

Challenge #13 in the Creative Constraints series. Hosted by Barry Twycross.
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Find a shot in your archive taken with an ultra long lens. I'm defining "ultra long" as more than 6 times the long side of your sensor. For full frame, that would be anything longer than 216mm.
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1200mm 1:1 to M-57 & IC-1296...
by geo444
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31st place
Messier-57 Ring-Nebula & tiny IC-1296 at lower right through a 1200mm FL lens - at 100% or 1:1 Ratio or Not Reduced - It was the Hazy-Quiet sky option ( versus the Transparent-Turbulent sky, are the usual 2 Weather options here at sea-side ! )
Submitted: Tuesday, 8th December, 2020 20:03 (GMT)
Taken: Friday, 19th June, 2020
Focal length: 1200 mm
Shutter speed: 240 sec
Aperture: F4.7
ISO: 400
Notes: ISO 400, 15 Exposures of 4 min. each Stacked - « at 100% or 1:1 Ratio or Not Reduced » - Fact Check : rotate the image 30° counterclockwise to put M-57 "egg" in vertical posit., it's +/- H=210, L=155 pixel, I image at 0.41"/pixel, my Skyplot map states M-57 was 1.38 arc-min. x 59 arc-sec. at film time, 1994. Result is H=201, L=143 pixel ! ;)
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