Canon ixus 85is achieve 50mm focal length
37632
How to compare the focal length of a 50mm prime lens with the default lens of a point and shoot camera?
14182
How to ensure sharp focus when shooting with an open aperture?
151884
How do I set focus range?
57370
What are the limitations of a typical kit lens as a general purpose lens?
126119
Focus in night photography
113163
Why do some lenses focus past infinity?
26420
Possible to lock focal length on zoom lens? (SELP1650)
22161
How do I get adequate depth of field in macro photography?
30788
Is the camera sensor or the lens the limit to resolution?
85095
Selecting optical size?
129613
Why does illuminance stay the same for a given f-stop even when focal length changes?
150759
Is there anything in medium format systems which can beat pro-level 35mm digital with fast lenses in low light?
657
How can I take a photo with everything in focus with my DSLR?
129284
Why no zoom lenses with a maximum aperture wider than f/2.8?
42808
Simply bad focus or too big aperture?
12994
Is it physically possible to build a long zoom (17-300 mm for example) at an aperture value of around 1.4 or 1.2?
6598
How to calculate the correct focal length needed for a subject of a given size and distance?