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Old 15-12-2020, 09:41 AM
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Astrofriend (Lars)
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Join Date: Aug 2017
Location: Stockholm, Sweden
Posts: 340
Pentax 645 300 mm ED f/4 lens

I bought another 300 mm lens as an alternative to the Canon 300 mm L lens I already have. The main reason is to achive a lower vignetting. I have very positive experience from an earlier medium format lens. This is the Pentax 645 300 mm ED f/4 lens with good reputation. If I get some positive results from this lens I maybe replace my Canon 300 mm lens with this one.

Here is some photos and data about the lens:
http://www.astrofriend.eu/astronomy/...645-300ed.html

I bought it mostly because I'm curious about it and want to test it. It's more than ten years older than the Canon lens.

Lars

Last edited by Astrofriend; 15-12-2020 at 09:59 AM.
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