I need a Camera 101 class. How to the F ratio's in a camera work, and how are they adjustable. What is 200mm? Is there a good intro somewhere?
I know I can to 10s exposures on my camera, as well as adjust the Fratio, I just dont know what it means. I have worked out that increasing the exposure time gives me more light.
But If i look it at like my telescope maths, then I am guessing a maller F ratio would mean better results for shorter exposures? Is that right.
I am thinking of geting a lense hood adpater for my A610 to add a zoom lense to it.
Like this aftermarket one.
http://www.lensmateonline.com/newsite/A620A610.html
Results with various lenses.
Wide angle:
http://www.lensmateonline.com/newsite/A620A610wide.html
Telephoto:
http://www.lensmateonline.com/newsite/A620A610tele.html
Regards.