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frogpoet
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since ‎12-26-2013
‎12-05-2018

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If an f6 lens with a 2x doubler won't autofocus why will a lens stopped to f22 still focus?

03-31-2015
I do not understand ?  If a telephoto zoom lens rated f4-6.3 wont autofocus if connected to a camera with a 2x converter why a lens stopped down to f22 will autofocus?

polarizers...linear vs circular

01-03-2014
Just trying to sort out the differences...and decide which is better for me...advice is another lamp at the crossroad..you still have to make the choice..its just easier to see which way you might prefer.

mirror / reflex lenses... how short do they get ? 55mm ?100mm ? 200mm ?

01-03-2014
so I am a "fuzzy donuts" nut..Mirror / reflex lenses... How short do they get ? 55mm ?100mm ? 200mm ?

focus screens...split lens horizontal or double diagonal...recommendations ?

01-03-2014
which is better... (advice is another lamp at the crossroad) ....I want to get a split lens focus screen for my Canon 600D/T3i.I shoot both wildlife and arcitecural subjects.I am debating on which is most likely my best bet... the horozontal single s...

polarizers

01-01-2014
whats the difference between a linear and a circular polarizer ? And what is best for reflex lenses ? 
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