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Message: <blockquote data-quote="Binastro" data-source="post: 3549518" data-attributes="member: 111403">Hi Maico.The Celestron 300mm f/1.5 Schmidt camera is probably a lot cheaper than a Nikon 300mm f/2.But it would need some kind of field flattener for a digital or a curved sensor. It maybe there are military curved sensors.The complete 36inch f/4 Wray lens housing with lens looks like a huge dustbin. I got one for £10. The others up to £60. I gave them to people who might use them and were stronger than me. They were used I think on 9x9 inch film at full aperture for night photography. Perhaps late 1960s, maybe Prof. Wynne designed it.The resolution is rather poor but does the job.  His Wray series 3 12 inch, 24 inch and 36 inch f/6.3 are really good. The earlier ones not so good.Oldham Optical, Scarborough? say they will make you a 300mm f/1 Schmidt camera and up to 500mm f/1.They say they have made 300mm f/1 mirrors. Probably cost a bit.The 240mm f1.2 Zoomatar for 70mm format with a Minolta MD mount and a Minolta MAF to MD adaptor would make a Zoomatar 300mm f/1.5 lens as the MAF to MD adaptor has a 1.25x lens element in it. This would fit either MAF or Sony A cameras. But the lenses go for about $35,000 dollars.I had numerous Kilfitt/Zoomar mount adapters for Alpa, Contarex, Minolta etc etc.Nikon do make some very good value binoculars. I haven't got any Nikon Action Ex as I don't need waterproofing.The 12x56 Nikon Roof prism I like, as I do the 12x56 Barr and Stroud.25 degree C today. I had the air conditioner on.P.S.Not sure if some Schmidt cameras have flat fields at focus or if all are curved. Some do have special extra correcting optics.</blockquote>

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