Search results for 'back focus' - page 739
Front Focus Issue - Help Needed
If the focusing screen or the mirror were out of position all your images would be out of focus with all lenses. It may be that this one lens is not hitting the focus point properly because of a slight error in the mechanics of the lens.
Posted by johnriley on 12/12/2008 - 23:07
Front Focus Issue - Help Needed
where can i get a chart please any help most greatfully recieved.:P Try http://focustestchart.com/focus21.pdf or http://regex.info/blog/photo-tech/focus-chart/ or http://pentaxdslrs.com/newchart.pdf thanks :mrgreen:
Posted by scottthehat on 12/12/2008 - 23:09
Front Focus Issue - Help Needed
I appreciate the fact that focus adjustment only fixes AF - but, is it possible as it seems, that the lens is focused correctly in MF and still shows front focus issues? would this be an issue of the focussing screen, and once this flips to capture the image the distance between sensor and lens is...
Posted by Mannesty on 12/12/2008 - 23:10
Front Focus Issue - Help Needed
"If the focusing screen or the mirror were out of position all your images would be out of focus with all lenses. It may be that this one lens is not hitting the focus point properly because of a slight error in the mechanics of the lens." This is what I also think - What do you think I sh...
Posted by nathanever82 on 12/12/2008 - 23:14
Front Focus Issue - Help Needed
Going to sleep now, thank you all for your help, will pick it up tomorrow morning, and try further experiment. Good night :D
Posted by nathanever82 on 12/12/2008 - 23:16
Front Focus Issue - Help Needed
Pleasant dreams . . . 50mm . . . FF . . .why why why why . . . .:lol: Seriously, if you get the same result with 2 X K10D bodies, it must be something to do with the lens, not the cameras mirror, prism, or focus screen.
Posted by Mannesty on 12/12/2008 - 23:20
Front Focus Issue - Help Needed
How come we never noticed this with our film cameras? I've asked myself that question many times John. The only mechanical cause I can think of is that we didn't have shake/dust reduction on film SLR's. Unless materials, design, production tolerances, and/or quality control of modern lenses are t...
Posted by Mannesty on 13/12/2008 - 08:02
Front Focus Issue - Help Needed
As far as I know, all makes of digital SLR suffer from this.
Posted by johnriley on 13/12/2008 - 09:30
Front Focus Issue - Help Needed
How come we never noticed this with our film cameras? I've asked myself that question many times John... Well, in the 'old days' we never used to look at our pictures in quite as much detail as we do now. One of my better selling prints is actually slightly out of focus. I didn't notice it looking...
Posted by Daniel Bridge on 13/12/2008 - 10:46
Front Focus Issue - Help Needed
You may well be right Dan.
Posted by johnriley on 13/12/2008 - 10:50
Front Focus Issue - Help Needed
An upgrade to a K20D wouldn't cost £500 if you sold one of your K10Ds to partly fund it. The net cost wouldn't be huuugely more expensive than buying a new lens, and you'd have one better camera as well. I've noticed slight AF errors with my FA 50mm 1.4 sometimes on my K10D. I suspect there is a ...
Posted by iceblinker on 13/12/2008 - 13:19
Front Focus Issue - Help Needed
Bear in mind that the FA50mm is not that sharp wide open*, and it's at this aperture that the camera is trying to focus. This may play a part in the focusing accuracy when using this lens. Dan *Certainly not as sharp as it is when stopped down a little bit. I'm not pointing this out as a fai...
Posted by Daniel Bridge on 13/12/2008 - 13:33
Front Focus Issue - Help Needed
Caveat duly noted Daniel! :wink: Some years ago I asked the then Sales Manager how accurate the AF of the Z1-P was. What I wanted to know was would it focus on say the eyes in a portrait and not just some ill-defined area around the face. He couldn't answer the question. Now we are expecting a...
Posted by johnriley on 13/12/2008 - 14:18
Front Focus Issue - Help Needed
THank you all very very much for your help and advice. I will have time on monday to experiment with MF - other apertures - longer distances. Will report on results as soon as I can. thank you in the meantime. Nathan
Posted by nathanever82 on 13/12/2008 - 20:10
Front Focus Issue - Help Needed
Any news Nathan?
Posted by Mannesty on 20/12/2008 - 14:15
Front Focus Issue - Help Needed
Apparently not :(.
Posted by Mannesty on 22/12/2008 - 12:25
Front Focus Issue - Help Needed
Chart here and instructions http://focustestchart.com/chart.html
Posted by LifeSpy on 22/12/2008 - 13:15
Front Focus Issue - Help Needed
Sorry peter, I haven't had any time to shoot recently... :( As soon as I get some free time i'll report back. Cheers!
Posted by nathanever82 on 23/12/2008 - 11:31
Pentax DA 12-24 or Sigma
I really must get round to trying out the Pentax 12-24, just to see how it compares to the Sigma. Not that I would change it, it's a focal length range that I rarely use, and the Sigma's great, but it would be nice to be able to do a comparison. Dan I'll pop over sometime in the New Year if you li...
Posted by womble on 16/12/2008 - 17:58
Sigma 70-200mm f/2.8 EX DG Macro HSM II
Hi I have been looking for a new lens for my K200D to replace my old Tokina AT-X 80-400 4.5-5.6 which has developed a fault. It would appear that the above Sigma lens is not compatible with my camera because of the focus motor in the Sigma lens. Tamron do a very similar lens that is compatible but...
Posted by Mintsman on 16/12/2008 - 16:11
