>>3342518>interestingI think the most interesting optic I have is the relay lens from a WWII submarine periscope. Same size as the epidiascope one but 4500mm f1:51. It's a vacume spaced achromatic doublet (vacume spaced because of the pressures deep under the ocean I suppose).
<pic related. I made a telescope out of it for one day. Great views of the Moon and Mars. For photography it would be quite soft due to diffraction but there was no chromatic aberration. It's a quite useless but fun object, you can turn a large room into a huge camera obscurer.
>Stuart Semple's Black 2.0Thanks for reminding me about him. A small bottle will go a long way for critical areas. So many little things to make one big thing, lol. Lack of contrast will kill an image faster than chromabs or softness.
To keep this on topic, people used to observe the the Full Moon and count the geese that would pass over the lunar disk to estimate/interpolate migration numbers for a season.
tl;dr two fags talk about optics in a wildlife thread. No zoo photos were posted.
