My question is by using my zoom buttons.
Mar 8, 2018 13:28:53 #
When I have my manual focus as close as it can go, and want to use my zoom button to get a closer picture of say a photo of a person, will this affect the quality of the photo. And Does it make a difference in the mode I decide to use. Thank you.
Mar 8, 2018 13:51:04 #
Welcome to UHH. Manual focus is manual focus. What camera do you have that has a Zoom button?
Mar 8, 2018 14:00:06 #
I'm not following "...manual focus as close as it can go..."
<Manual> focus is making an image clear/not clear. After changing your zoom, you may have to refocus depending on the focus point. Focus and zoom are two separate functions.
<Manual> focus is making an image clear/not clear. After changing your zoom, you may have to refocus depending on the focus point. Focus and zoom are two separate functions.
Mar 8, 2018 14:53:26 #
Mar 8, 2018 14:54:23 #
Mar 8, 2018 15:12:49 #
jackpinoh
Loc: Kettering, OH 45419
2CWorld wrote:
When I have my manual focus as close as it can go, and want to use my zoom button to get a closer picture of say a photo of a person, will this affect the quality of the photo. And Does it make a difference in the mode I decide to use. Thank you.
Many lenses loose focus as you change the focal length. If you have a camera with an electronic viewfinder, you can 1) zoom to get the composition you want, 2) autofocus to get in the ballpark focus-wise, and then 3) use focus magnification and manual focusing to achieve precision focus. (Focus magnification is not the same as zooming.)
Mar 8, 2018 15:48:34 #
jackpinoh wrote:
...(Focus magnification is not the same as zooming.)
Unless the camera has a digital zoom like my H-1 does.
Mar 8, 2018 16:03:14 #
2CWorld wrote:
I have a Sony Alph SLT A57K
If your camera has direct manual focus (DMF) feature, you can zoom in and the image will temporarily magnify so you can fine tune the focus. It won’t have any effect on the recorded image itself.
Mar 8, 2018 16:09:17 #
jackpinoh
Loc: Kettering, OH 45419
Longshadow wrote:
Unless the camera has a digital zoom like my H-1 does.
The mechanical zoom of a lens does not magnify the subject! It simplify changes your lens field of view and depth of field.
A digital zoom results in up-scaling data from a subsection of the image sensor at a specific lens focal length. Digital zoom does not affect focal length or depth of field. Photo resolution is diminished as a result the upscaling process.
Magnification is a display (and display only) of a subsection of the image sensor for use in assessing critical focus and does not affect the photo in any way.
Mar 8, 2018 17:54:52 #
jackpinoh wrote:
The mechanical zoom of a lens does not magnify the... (show quote)
Interesting. When I zoom past the mechanical zoom using the digital zoom, I do get what the digital zoom sees, not the image from the limit of the mechanical zoom. Display magnification for fine-tuning your focus is different.
Mar 9, 2018 11:44:59 #
2CWorld wrote:
When I have my manual focus as close as it can go, and want to use my zoom button to get a closer picture of say a photo of a person, will this affect the quality of the photo. And Does it make a difference in the mode I decide to use. Thank you.
Are you asking about using the 1.4x and 2.0x button? This only works with jpg images. As with most tele-extenders you get a little more noise. There is a NR option in the Sony menu with helps with noise reduction (NR). Also the Capture One Express for Sony (free) has good noise reducing ability. In post.
Mar 10, 2018 13:10:27 #
My lens is a 18-55 mm lens I'm taking a picture of a throw blanket on a stool about 6 ft away. I have my camara set on Intelligent Auto and automatic focus, so I set my lens on 55mm, looks blurry, my zoom button goes from x1.0 to x4.0, so I set it at 4.0. Still looks blurry, press my focus button half way and take the shot and I can see the close up texture of the throw very clear. This is what I guess I'm getting at, I don't notice any noise. That's why I'm asking this question. I get that the zoom button is totally different from the focus length on the lens. But I'm not getting that I can take a very close up picture that is clear without the noise. The explanations that I received are a little over my head but I get that they have two different functions. But why am I capable of doing this is my question now. Thank you for your last explanations.
Mar 10, 2018 14:01:00 #
Mar 10, 2018 14:15:34 #
Just now getting what your saying, after asking a question of my next experimentation on photos I took. Thank you.
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