aleksamoon
TPF Noob!
- Joined
- Aug 20, 2016
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I've recently been experimenting with taking portraits (and other shots) with a Promaster Aspherical 28-200mm f3.8-5.6 lens on a Sony Alpha 55. When zoomed out all the way or nearly all the way the image appears to be quite blurry all over with no defined focal point. (I'm using single-point autofocus for these shots, which works fine at shorter focal lengths, as well as a tripod). This has happened in both full sun and golden hour conditions. It also happens when shooting in both RAW or JPG. These images are sometimes soft, yet usable (if I'm being liberal) as uploaded off my memory card, the problem really gets out of hand when I try need to zoom in to crop the photo at all - the detail just isn't there and the blur is overwhelming. ISO for all shots is 100.
I did some experimenting with a book in the grass last night to try to determine if I might have a front or back focus problem. When I shot the book at a distance of about 30 feet the image was just soft all over. One taken with the same exposure settings about 10 feet closer came out more clear (although still not a high enough quality to crop) and showed the grass more or less in focus on the same plane as the book.
Also took a few shots of a tree also about 30 feet away. It came out very blurry at slower shutter speeds (1/2 second and 1 second). What would be causing so much blur on a still object while using a tripod? Steadyshot was on for all of the photos I'm speaking about and there was no wind. I'm not using a remote, so could it still be camera shake from me touching the shutter button?
Sorry that I'm not able to upload more pictures, having tech difficulties with website at the moment. Any ideas would be MUCH appreciated!! I'm wondering if there might be some kind of film on the lens that I'm not seeing with naked eye (cleaning with lens wipes), if this might be some kind of damage to the camera itself, to the lens, or if this is just a crappy lens? Was also going to upload a closeup of a flower taken at 180mm in daylight that, while not blurry, also shows a lack of detail (no tripod on that shot). Thank you in advance!
I did some experimenting with a book in the grass last night to try to determine if I might have a front or back focus problem. When I shot the book at a distance of about 30 feet the image was just soft all over. One taken with the same exposure settings about 10 feet closer came out more clear (although still not a high enough quality to crop) and showed the grass more or less in focus on the same plane as the book.
Also took a few shots of a tree also about 30 feet away. It came out very blurry at slower shutter speeds (1/2 second and 1 second). What would be causing so much blur on a still object while using a tripod? Steadyshot was on for all of the photos I'm speaking about and there was no wind. I'm not using a remote, so could it still be camera shake from me touching the shutter button?
Sorry that I'm not able to upload more pictures, having tech difficulties with website at the moment. Any ideas would be MUCH appreciated!! I'm wondering if there might be some kind of film on the lens that I'm not seeing with naked eye (cleaning with lens wipes), if this might be some kind of damage to the camera itself, to the lens, or if this is just a crappy lens? Was also going to upload a closeup of a flower taken at 180mm in daylight that, while not blurry, also shows a lack of detail (no tripod on that shot). Thank you in advance!
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