unanswered questions
Dec 5, 2011 18:34:19 #
1. what's with the using of f/22 and higher?
i keep reading that anything shot higher than f/11 will result in distortion.
2. claim: canons shooting at top resolution can do better with a squared off silhouette rather than a rounded one.
3. there's never been talk of hyper-focal distance.
i keep reading that anything shot higher than f/11 will result in distortion.
2. claim: canons shooting at top resolution can do better with a squared off silhouette rather than a rounded one.
3. there's never been talk of hyper-focal distance.
Dec 5, 2011 18:48:49 #
Usually, the "Sweet Spot" of a lens is mid-aperture range. As the aperture size decreases, a phenomenon known as "aperture diffraction" can adversely effect resolution. See: http://www.bobatkins.com/photography/technical/diffraction.html
Each lens design is different, and each lens design has its own aperture diffraction pattern. Some manufacturers' lenses perform better than other manufacturers.
I shoot Nikon. Here is a lab bench test of one of my favorite lenses, and a heavily cropped macro-photograph of typical exposure.
Each lens design is different, and each lens design has its own aperture diffraction pattern. Some manufacturers' lenses perform better than other manufacturers.
I shoot Nikon. Here is a lab bench test of one of my favorite lenses, and a heavily cropped macro-photograph of typical exposure.
Nikon Nikkor AF-S Micro 105 mm f/2.8G IF-ED VR
Hand-held Nikon D90 at ISO 400 with 105-mm macro lens, 1/200-sec at f/22, overcast sky and SB-600 flash unit with O-Flash 3/4-circle Fresnel prism attachment. 4-mm long fruitfly cropped to approximately 16:1 mag, or 16x life-size.
Dec 5, 2011 19:21:39 #
arthur Baum wrote:
1. what's with the using of f/22 and higher?
i keep reading that anything shot higher than f/11 will result in distortion.
2. claim: canons shooting at top resolution can do better with a squared off silhouette rather than a rounded one.
3. there's never been talk of hyper-focal distance.
i keep reading that anything shot higher than f/11 will result in distortion.
2. claim: canons shooting at top resolution can do better with a squared off silhouette rather than a rounded one.
3. there's never been talk of hyper-focal distance.
Nikonian is right on the money for #1 - usually it isn't bad enough that most of us could see the effects in a print anyway
#2 - have no idea what the question is
#3 There has been quite a bit of talk and examples of hyper-focal distance on here, here is one of the threads
http://www.uglyhedgehog.com/t-8465-1.html
with links too ;-)
GT
Dec 6, 2011 13:01:26 #
Dec 6, 2011 20:34:27 #
Nikonian72: So you shot the fly at 1:1 and did a 16X digital zoom ?
Dec 6, 2011 20:56:44 #
This was shot handheld with a Pentax K-x and 18-55mm at F20
ISO 250 Exp. 1/40 Built in flash
Dec 7, 2011 00:25:28 #
imagemeister wrote:
Nikonian72: So you shot the fly at 1:1 and did a 16X digital zoom ?
"Digital zoom" is a term usually associated with P&S in-camera programming. Cropping was PP.
Dec 7, 2011 00:34:31 #
Nikonian72 wrote:
"Digital zoom" is a term usually associated with P&S in-camera programming. Cropping was PP.
imagemeister wrote:
Nikonian72: So you shot the fly at 1:1 and did a 16X digital zoom ?
"Digital zoom" is a term usually associated with P&S in-camera programming. Cropping was PP.
WOW!
I just noticed you posted this tomorrow!
Man, you ARE good!!! :-D
I apologize for the hijack, but I couldn't resist...
GT
Dec 7, 2011 00:44:51 #
GTinSoCal wrote:
WOW! I just noticed you posted this tomorrow! Man, you ARE good!!!
I promised Marty that I would have his De Lorean home before midnight.
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.