Hello Hedgehogs
I've recently upgraded from my 18-55mm to a Tamron 90mm macro lens. Loving it in its entirety but there's something wrong with how I'm taking photographs that's preventing my photos from being sharp and I'd like to correct that. The problem is that I don't know what I'm doing wrong. I'm still new to this.
Here is a (in my opinion) reasonably sharp image of a pocket knife. Here I used a tripod, remote shutter, f/13, 1/8 shutter speed, 100 ISO, used flash and tripod
(
Download)
Below are photos of the thread of a lightbulb under a continuous LED and basic living room lighting. These are not as sharp as I feel they could be. F/8, 1/100, ISO 1000, no flash and hand-held
(
Download)
F/16, 1/8, ISO 100, tripod and no flash
(
Download)
SonyA580
Loc: FL in the winter & MN in the summer
I'm not a full time macro guy but it looks to me like the DOF is the problem (and it always is when I shoot macro). You can probably get more help if you post this in the "Macro" section on UHH.
(Lack of) depth of field (dof) is what's killing you. Though the macro folks will better enlighten you, let me be the first to say you'll want to start looking into focus stacking.
Cany143 wrote:
(Lack of) depth of field (dof) is what's killing you. Though the macro folks will better enlighten you, let me be the first to say you'll want to start looking into focus stacking.
I should have specified that I'm concerned about what is in focus.
I also have the Tamron 90mm macro. That lens has a minimum focus distance of about 11.5 inches. I'm usually guilty of trying to get the lens too close to the subject. The macro guys can give you more help, I'm sure!
This youtube video should help you.
Harvey
https://www.youtube.com/watch?v=F3Dz34MMjQ0Cany143 wrote:
(Lack of) depth of field (dof) is what's killing you. Though the macro folks will better enlighten you, let me be the first to say you'll want to start looking into focus stacking.
I'm only talking about the sharpness of the parts in focus. I'm aware of the limited DOF with macro photography. But I greatly appreciate it.
Levi M. wrote:
Hello Hedgehogs
I've recently upgraded from my 18-55mm to a Tamron 90mm macro lens. Loving it in its entirety but there's something wrong with how I'm taking photographs that's preventing my photos from being sharp and I'd like to correct that. The problem is that I don't know what I'm doing wrong. I'm still new to this.
The photo below tells the story. The white areas indicate out of focus, the image area shows that which is in focus.
The camera lens was not parallel to the whole of the image plain, thus a strip of image only. It is not a lens problem, its exactly as above posters have said, its a depth of field problem.
The other two images have even less in focus, the ridges of the screw thread (actually only the parts nearest to the lens) are in focus, but again the lens was not parallel to the subject so the further away from the lens , the less in focus.
You can get great macro pics without using layer stacking. I have been doing it since the 1980's. Try using f 32.
Yes - "If" your lens goes to f 32 or even f22" the higher f stop and slower shutter speed always produces sharper images if you can still balance the ISO and lighting.
Vietnam Vet wrote:
You can get great macro pics without using layer stacking. I have been doing it since the 1980's. Try using f 32.
Linary wrote:
The photo below tells the story. The white areas indicate out of focus, the image area shows that which is in focus.
The camera lens was not parallel to the whole of the image plain, thus a strip of image only. It is not a lens problem, its exactly as above posters have said, its a depth of field problem.
The other two images have even less in focus, the ridges of the screw thread (actually only the parts nearest to the lens) are in focus, but again the lens was not parallel to the subject so the further away from the lens , the less in focus.
The photo below tells the story. The white areas ... (
show quote)
thank you for the explanation! But I know. I understand depth of field. My concern is with the sharpness of what is in focus. I feel as if it could be sharper. No matter what I do, it appears as if the in-focus parts of the image are a bit fuzzy.
I find the best sharp focus in macro photography is focus with the lens and the final adjustment is moving the camera in or out ( on a track)
Levi M. wrote:
thank you for the explanation! But I know. I understand depth of field. My concern is with the sharpness of what is in focus. I feel as if it could be sharper. No matter what I do, it appears as if the in-focus parts of the image are a bit fuzzy.
You know that handholding isn't going to compete with a tripod, and you also know that more light allowing a faster shutter speed will yield better results. Those two are pretty obvious.
Next though is the question of how you focus. How are you focusing?
If you are using auto-focus, how do you know your camera/lens combo isn't slightly front-focusing (focusing slightly in front of the intended point)?
I'd use a tripod and remote, turn on LiveView, go to max magnification of the area, and manually focus. Arrangement of the lighting to cause high lighting contrast at the in-focus area can also help the appearance of the sharpness.
Jerry G
Loc: Waterford, Michigan and Florida
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.