Serene Life

by garik

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

93,651 reputation
3196343
bio website mattgrum.com
location
age
visits member for 4 years, 1 month
seen 2 hours ago

1d
awarded  Enlightened
1d
answered How does a modern DSLR camera and lens actually adjust its aperture
Oct
21
awarded  Nice Answer
Oct
20
answered What is a pump zoom lens?
Oct
20
comment Is there a viable way to touch up the paint on an old camera body?
I've heard of people using lead-based touch-up pens designed for firearms, depending on what country you live in they could be easy or difficult to get hold of...
Oct
20
answered Do focal length changing lens adapters affect the F-stop of a lens?
Oct
16
awarded  Good Answer
Oct
15
revised Do I use the crop factor in calculating aperture size and area?
added 14 characters in body
Oct
15
awarded  Nice Answer
Oct
14
comment Do I use the crop factor in calculating aperture size and area?
@BBking it is right, you do obtain the real focal length by dividing the 35mm equivalent length by the crop factor compared to 35mm (e.g. Nikon 1 kit lens is a 27-80 equivalent, divide by the crop factor (2.7) and you get 10-30mm which is what's printed on the lens barrel). I could change the answer but the question specifically asked how to calculate the aperture size when you have an equivalent focal length for real f-number.
Oct
14
awarded  Nice Answer
Oct
14
comment Do I use the crop factor in calculating aperture size and area?
@BBking read the question again, the lens has a 50mm FF equivalent field of view on a 1.5x crop sensor, hence it's really a 33mm lens, hence the entrance pupil diameter (on all formats) is 11.9mm
Oct
14
answered Do I use the crop factor in calculating aperture size and area?
Oct
10
awarded  Good Answer
Oct
10
answered Viewfinder coverage: is it area or angle of view?
Oct
10
comment Viewfinder coverage: is it area or angle of view?
@laurencemadill that's right, but I think the question is asking whether you 95% of the image area, or 95% of the image width.
Oct
10
awarded  Nice Answer
Oct
9
answered What's the use of exposure bracketing in film cameras?
Oct
9
comment Infinity focus problem
@user1207217 If the lens is indeed fully manual then what you see in live view should be pretty much what you get. In any case the final resulting image should be sharper than the live view image. I cannot think of any reason for it to be the other way round, unless shutter speed was a factor (the image you posted shows no signs of motion blur). How was the second image obtained? Was it a cell phone picture of the camera's LCD screen or did you download the image from the camera's memory card?
Oct
8
answered Infinity focus problem