Sharpness Question
Jan 31, 2016 23:00:29 #
tdekany wrote:
ISO 2000? What are you smoking up there in Alaska?
The useful dynamic range on a D750 at ISO 4022 is 6.4 fstops, or about as low as one wants to go. That requires nailing exposure perfectly and allows no tone mapping or contrast manipulation.
At ISO 2011 the dynamic range is 7.3 fstops, allowing at least some room for manipulation.
It pays to know your camera...
Jan 31, 2016 23:15:21 #
tdekany wrote:
Well, that and f32. The OP wants sharpness which will likely start suffer diffraction starting at f16. And high ISO will most likely introduce noise, which will compromise sharpness also.ISO 2000? What are you smoking up there in Alaska?
Jan 31, 2016 23:58:10 #
LoneRangeFinder wrote:
This guy knows close-up and macro-photography quite well. Read and re-read his suggestions. Unlike other advisers (some from the far north), Allen actually posts photos to support his advice. Many, many photos.. . . sharpness and DOF are not the same thing.
Feb 1, 2016 00:04:33 #
Nikonian72 wrote:
This guy knows close-up and macro-photography quite well. Read and re-read his suggestions. Unlike other advisers (some from the far north), Allen actually posts photos to support his advice. Many, many photos.
:thumbup:
Feb 1, 2016 00:29:14 #
Nikonian72 wrote:
I concur :thumbup:This guy knows close-up and macro-photography quite well. Read and re-read his suggestions. Unlike other advisers (some from the far north), Allen actually posts photos to support his advice. Many, many photos.
Feb 1, 2016 00:33:27 #
I personally could not move back the small distances without a rail without getting my composition screwed up.
And yes his lens is good for this type of close ups -I took many thinking I was doing true macro.
Suggestion appreciated.
And yes his lens is good for this type of close ups -I took many thinking I was doing true macro.
Suggestion appreciated.
SharpShooter wrote:
Harvey, I agree with you, BUT, he definately does not need the macro lens or the focus rail! A good tripod...., yes. But that flower is pretty big. Any std. Lens including what he is using will do the stack he needs
For a fly, yes...., for a flower, no!! Just my opinion as to how I would do that! ;-)
SS
For a fly, yes...., for a flower, no!! Just my opinion as to how I would do that! ;-)
SS
Feb 1, 2016 00:34:25 #
Apaflo wrote:
It pays to know your camera...
On a tripod, I always use the lowest iso to get the best DR. I am willing to learn, so please post an example?
Feb 1, 2016 01:08:46 #
I just did a search on UHH for macro iso and most all I read mentioned using low - 100 to 400 iso-most mentioned 100-200 and only go higher in darker images. A couple did also say that the higher iso the greater possibility of noise
.
.
Nikonian72 wrote:
This guy knows close-up and macro-photography quite well. Read and re-read his suggestions. Unlike other advisers (some from the far north), Allen actually posts photos to support his advice. Many, many photos.
Feb 1, 2016 01:43:42 #
tscali wrote:
I'm trying to learn the art of a taking a sharp picture by using a flower. Notice the core around the center is not sharp. I've tried adjusting my aperture from 4.0 (lowest possible) to 8.0 with little change. I'm using a very good tripod and a remote trigger. Is it the color, the light, I really do not know. I've played with Nikon Capture and was not able to improve it. I'm using a Nikon D750 with a 24 - 120mm f/4.0 lens. Any suggestions would be greatly appreciated.
According to the EXIF data attached to the picture, it was shot at f6.3, 1/250 sec, ISO 4000, at a focus distance of 45 cm (18 inches). The depth of field was 4mm (about 1/6 inch). Besides that the minimum focus distance for that lens is 18 inches - exactly the distance of your camera to the flower. It appears that the focus distance recorded was to the spreading petals since they seem to be the most in focus. If so, the centre part of the flower is closer than the minimum focus distance of the lens and couldn't possibly be in focus. No tripod, depth of field adjustment or black magic will make your lens achieve focus closer than the minimum focus distance. The EXIF data attached to the image file is confirmed by the attached calculation from a DOF calculator.
Feb 1, 2016 01:43:53 #
tdekany wrote:
You know that won't happen :| I am willing to learn, so please post an example?
Feb 1, 2016 01:58:14 #
Feb 1, 2016 02:02:54 #
tscali wrote:
I'm trying to learn the art of a taking a sharp picture by using a flower. Notice the core around the center is not sharp. I've tried adjusting my aperture from 4.0 (lowest possible) to 8.0 with little change. I'm using a very good tripod and a remote trigger. Is it the color, the light, I really do not know. I've played with Nikon Capture and was not able to improve it. I'm using a Nikon D750 with a 24 - 120mm f/4.0 lens. Any suggestions would be greatly appreciated.
I'd say just move the camera back a little bit, (you can always crop if needed) so you can nail focus.
Feb 1, 2016 02:49:41 #
tdekany wrote:
This is a good method macro photos use to achieve greater DoF in some instances. Move back, shooting at slightly less than 1:1 (true macro), then cropping back to 1:1 or greater.I'd say just move the camera back a little bit, (you can always crop if needed) so you can nail focus.
Feb 1, 2016 02:58:13 #
mcveed wrote:
According to the EXIF data attached to the picture... (show quote)
That is exactly the significance! There is no way to get that magnification with enough DOF to include the entire flower in a single shot. There are, as I noted previously, a few things that can make a "better" image, but the DOF issue is not going to be solved. Short, of course, of some very different equipment.
Feb 1, 2016 03:05:13 #
Macronaut wrote:
This is a good method macro photos use to achieve greater DoF in some instances. Move back, shooting at slightly less than 1:1 (true macro), then cropping back to 1:1 or greater.
While I only shoot M4/3 (no big sensor here) still, look how "much" DOF I get at F7.1 (14.2 in FF)
In this shot I didn't want the whole flower in focus but even with M4/3 you have to stop down a lot for more DOF
I did use my Oly 60mm (1:1) Macro lens here and the flower is only a little wider than an inch.
P1280003-2 by Thomas Dekany, on Flickr
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.