Focussing Problem

[foto_123]

Hello,

I have a Rebel XTi, and I've noticed that when I turn on the MANUAL focus on my lenses and take a picture, I've noticed that the resulting image is never sharp. This happens even when I have the camera on a stand and there is no shake involved. All I'm trying to do is to take a sharp picture without getting too creative.

On the contrary when I take a picture in the AUTO focus mode with the settings (shutter speed, aperture,film speed etc) remaining constant, my subject is rendered with much more clarity and sharpness.

If I'm getting my basics wrong with respect to the way I'm holding the camera or focussing my subjects then I'd like to correct them.

Please help. Thanks in advance.
-foto_123

 

[Copacetic]

Well, I'm no expert, by far, but it sounds to me like you simply aren't getting the subject fully in focus. Fiddle with the manual focus more at closer ranges, get more familiar with the way it works on your lens(es), then gradually extend the distance. I think you're just not quite hitting that 'sweet spot' because of not knowing your lens well enough yet, perhaps.

 

[prodigy2k7]

I agree with above post.

 

[Garbz]

But don't take that personally. These cameras were never really all that manual focus friendly. This is the reason some of us modify our cameras to include manual focus assists like microprisms or split prisms in the viewfinder. Regardless of technique before I modded mine I rarely got more than 50% of my photos in focus.

 

[K_Pugh]

Manual focusing can be testing at times.. i have to manual focus with my Tamron 20-40mm as it back focuses in auto.

Another thing to make sure is that your diopter is set right, may be a fraction out? if you have one, not sure, not a canon guy.

 

[Steph]

That may sound stupid but most dSLRs have a diopter adjustement in the viewfinder (I don't know for the XTi specifically); is yours adjusted for your eyesight?

 

[Overread18 6]

The XTi does have a diopter - little wheel above the viewfinder just to the right - and from what you say I would also think this could be the problem. Check your manual for how to set it and get it set for your eyes (it takes only a few moments and is simple to do).

 

[Moglex]

Find something where the focus will be easy to see and is in good light.

Use the autofocus to get the lens in focus.

Adjust the control wheel for best perceived focus.

And that's the job done!