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New K100Y + 3 Lenses

Started May 15, 2020 | Discussions thread
bob5050 Senior Member • Posts: 2,948
Re: Manual focus

Photodog2 wrote:

"special glass that 'excels in refraction'" [...]. What does this mean?

I thought that puzzler as well. I'd normally think of refraction characteristics as being important for lens glass, not the pentaprism.

bob5050

 bob5050's gear list:bob5050's gear list
Fujifilm XP130 Pentax K-3 Pentax K-3 Mark III Pentax smc DA 18-135mm F3.5-5.6ED AL [IF] DC WR Sigma 17-50mm F2.8 EX DC OS HSM +6 more
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