Big difference between analogue photography and digital videography. Old film is infinite pixels.
Nonetheless, adding a doubling lens will degrade you ability to control the shot. The better the lens’ the more room you will have theoretically. The effect I’m talking about is far more noticeable with wide-angles, there is a zone it works good in then you begin to lose control once you get out of that zone.
Had this camera not been maxed in its parameters it would have been clearer. Had he the proper filters for the atmospherics it would have been clearer.
If your assessment of this being an aircraft moving towards the camera my points would be moot. The shot of a closer object moving at a lower speed and altitude would have been much easier to capture with the set-up mounted on that chopper.
That post is all interesting stuff and fun technical talk, but it is completely irrelevant and speculative. And I strongly disagree with the last sentence. 500 mph at 8 miles away, and heading more perpendicular to your line of sight is MUCH more difficult to track than 5,000 mph at 100 miles away traveling closer to parallel to your line of sight.
BTW, fwiw, I used to have a zoom lens and doubler for my Canon A1 back in the early 80’s. The double degraded the picture too much via dark and blurry corners and overall contrast to the point that it didn’t take me long to stop using it. I was young and cheap - It was all about “my lens is bigger than yours”. :)
My friend that I went to Hawaii with last week is a Leica rnagefinder film camera nut (he shot 8 rolls while we were there). He just bought one with the Zeiss f .95 50mm lens for around $150 at a junk/antique shop last spring. It cost him $200 to refurbish the camera and he just sold the lens on the internet for $1,600 (he was asking $2,500). He put different glass on the camera because the .95 lens was way too big (diameter), heavy and impractical, but the guy that bought it just had to have the “one of a kind” lens. That thing weighed a ton. It was like holding a big flat hand full of glass. My friend is doing these sort of deals to build up his funds for a super Leica digital setup.
And yeah, wide open it had almost no DOF. And the guy he sold it to got a great deal, relative to the lenses actual value.