Tack Sharp Photos
Nov 22, 2020 13:41:27 #
bleirer wrote:
Very similar to Perry's. Great minds.... He adds shutter speed awareness or maybe I glossed over that part of your laundry list.
I'm more of an IS/VR kind of guy nowadays, being so technology forward
coupled with good shooting technique.Nov 23, 2020 07:02:38 #
DirtFarmer wrote:
I find a sharp edge in the photo. I then take the ... (show quote)
I'm gonna do what Dirtfarmer does... huh?
Nov 23, 2020 08:15:24 #
StanMac
Loc: Tennessee
RWR wrote:
I view mine on a light box with a 20X loupe. That works out best for me.
😁😁😁😁🆒
Stan
Nov 23, 2020 08:29:12 #
On second reading, I more or less grasp the concept of your technique. It could prove useful for an objective measure of sharpness.
Human perception can detect sharpness, too. I rely on this organic approach.
Human perception can detect sharpness, too. I rely on this organic approach.
DirtFarmer wrote:
I find a sharp edge in the photo. I then take the ... (show quote)
Nov 23, 2020 09:13:01 #
My original use of this technique was to study the importance of diffraction with different apertures.
https://www.uglyhedgehog.com/t-645702-1.html
https://www.uglyhedgehog.com/t-645702-1.html#11204245
Using a numeric approach allowed me to produce a graphic representation of the sharpness as a function of aperture.
https://www.uglyhedgehog.com/t-645702-1.html
https://www.uglyhedgehog.com/t-645702-1.html#11204245
Using a numeric approach allowed me to produce a graphic representation of the sharpness as a function of aperture.
Nov 23, 2020 09:30:17 #
I see you use your method to determine sharpness for technical reasons, apart from other considerations, such as shutter speed and mirror slap.
DirtFarmer wrote:
My original use of this technique was to study the importance of diffraction with different apertures.
https://www.uglyhedgehog.com/t-645702-1.html
https://www.uglyhedgehog.com/t-645702-1.html#11204245
Using a numeric approach allowed me to produce a graphic representation of the sharpness as a function of aperture.
https://www.uglyhedgehog.com/t-645702-1.html
https://www.uglyhedgehog.com/t-645702-1.html#11204245
Using a numeric approach allowed me to produce a graphic representation of the sharpness as a function of aperture.
Nov 23, 2020 09:41:18 #
anotherview wrote:
I see you use your method to determine sharpness for technical reasons, apart from other considerations, such as shutter speed and mirror slap.
Yes. Of course the test images were taken with a static subject, camera on a tripod and shutter delay 2 seconds.
It was a fun project and an excuse to get more proficiency in Python. Got a pretty good graphing library out of it. (The graphing routines got started in Fortran around 1963, got translated into Pascal in the '80s and into Python this year).
Nov 23, 2020 09:57:20 #
I wouldn’t want to sit on one, but why settle for “tack sharp” when a razor is even sharper?
Nov 23, 2020 10:03:33 #
bleirer wrote:
Coincidence! I just viewed this video. Not exactly on topic, but related. Steve Perry secrets for sharper wildlife photos...
https://youtu.be/TLe6mXjFRdA
https://youtu.be/TLe6mXjFRdA
Thank you, I enjoyed this video!
Nov 23, 2020 10:08:26 #
Have you tried locking up the mirror of a DSLR? This setting has nothing to do with a technical evaluation. It eliminates the minute vibration from mirror slap.
If you set a bubble level in the hot shoe, then you can see the slight vibration by disturbance of the level fluid when the mirror locks up. In my experience, this setting coupled with others produces the sharpest image possible from the given optics.
It might prove useful to your method (if I understand it) by removing another variable affecting sharpness.
BTW: I defer to your dedicated measurements and process over the decades.
If you set a bubble level in the hot shoe, then you can see the slight vibration by disturbance of the level fluid when the mirror locks up. In my experience, this setting coupled with others produces the sharpest image possible from the given optics.
It might prove useful to your method (if I understand it) by removing another variable affecting sharpness.
BTW: I defer to your dedicated measurements and process over the decades.
DirtFarmer wrote:
Yes. Of course the test images were taken with a static subject, camera on a tripod and shutter delay 2 seconds.
It was a fun project and an excuse to get more proficiency in Python. Got a pretty good graphing library out of it. (The graphing routines got started in Fortran around 1963, got translated into Pascal in the '80s and into Python this year).
It was a fun project and an excuse to get more proficiency in Python. Got a pretty good graphing library out of it. (The graphing routines got started in Fortran around 1963, got translated into Pascal in the '80s and into Python this year).
Nov 23, 2020 13:20:36 #
DirtFarmer wrote:
I find a sharp edge in the photo. I then take the ... (show quote)
Sounds like a quick and easy fix.
Nov 23, 2020 17:30:06 #
R.G. wrote:
That's the best way to do sharpening and denoise because it's the best level for optimising sharpness and noise removal. Rather than thinking about whether a photo is tack sharp or not you should concentrate on optimising what you have, regardless of whether it falls into the category of "tack sharp" or not. What matters most is what it looks like at normal viewing distance, and if you've optimised it at 100% you'll know it's as good as it can be.
I agree, if one needs to use a loupe to tell if an image is sharp then do not look at digital images. Coming from film days I say digital is not as sharp film was. (Launch slings and arrows.)
Nov 23, 2020 19:38:02 #
tca2267 wrote:
What is the best way to view photos to tell is they are "tack sharp?'
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
I usually look at them in the editor at 100%....is this the "best" way to determine
if a photo is "tack sharp?"....
--------------------
Yes
Nov 23, 2020 19:51:13 #
Nov 23, 2020 23:56:48 #
I like raptors. If the eye is not tack sharp, I delete. Since I always burst, there are usually some keepers along with discards.
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