Search results for 'back focus' - page 1008
Sigma 85 1.4
I have one, bought a few months ago. The first one I bought was very eccentric, it would focus perfectly, then not, then hunt around. I took it back (to MicroGlobe) and they gave me a replacement. Chalk and cheese. A very, very sharp lens, by f2.8 as sharp as any I have. It is very usable at f...
Posted by lemmy on 22/10/2011 - 16:50
650-1300 lens info please
Someone asked a similar question a while back - when I searched the tinterweb for pics from this lens they were really not good - so much so I suggested that the prospective purchaser at the time would be better off rolling up his money and poking himself in the eyes with it rather than buying the l...
Posted by Stuey on 20/10/2011 - 22:18
Pentax 50-135mm for concert
The 50-135mm is probably the best Pentax lens for the job, unless you fancy being brave with something like the 70mm DA Ltd (or 77mm FA Ltd). I have previously used a 120mm f2.8 for a stage show but as it was a small theatre I ended up flat against the back wall to get the shots I wanted. Fine a...
Posted by Dangermouse on 23/10/2011 - 23:08
Recommend me a macro lens lens
100ish mm is a good (and pretty standard) focal length for a true macro lens. It's long enough to be able to keep a bit of distance from skittish subjects like insects, and still short enough to be perfectly usable handheld (especially with SR). Assuming you are looking for a new lens the is an...
Posted by MarkTaylor on 24/10/2011 - 22:51
Recommend me a macro lens lens
I am looking for AF. I know everyone says macro should be done with MF, but having tried load of combinations, I am rubbish at it. That may be because you're working handheld, rather than MF. Hand held macro is possible but only in really good light (generally with flash). Bear in mind that 'C...
Posted by petrochemist on 24/10/2011 - 23:58
Recommend me a macro lens lens
Arrrggghhhhhhhhhh Was just about decided on the Pentax 100mm and then stumbled upon the Tamron 90 mm review on the other site. Now just confused Advantages of the Pentax: 1) It is weather sealed (assuming you're going for the WR version anyway). 2) Build quality is better. 3) The lens...
Posted by MarkTaylor on 25/10/2011 - 23:13
k5 af adjustment
I have just replaced my k20d body with the K5 as the shop was offering such a good deal and decided that the first thing I should do is check focusing for my lenses. Anyway it seems that my 77 needs more than the adjustment allows. Even at the maximum of 10+ it still seems slightly out of focus. ...
Posted by kiwao on 24/10/2011 - 23:59
k5 af adjustment
maybe try a box of cerieal with a ruler angled on one side, focus on the flat subject then you can see if its of by looking at the ruler. also you can adjust more than + and - 10 by set all lenses at -10 then adjust that one by -10 i think, cant remember 100% but there is away.
Posted by pentaxanne on 25/10/2011 - 10:16
k5 af adjustment
Thanks for your comment that is a good idea. Actually after going here I tried the moire test also and that gave the same result. I didn't try the focus chart at an angle because Pentax have said to me that it is not a good way to check the focus. I gave u trying myself and went to Penta...
Posted by kiwao on 25/10/2011 - 11:33
k5 af adjustment
I thought the adjust all and adjust each wasn't cumulative ? Pete You are correct it isn't. I do not know how they will adjust it. I thought that if I was having to dial in so much adjustment that there may be a fault in the lens but they assured me that it can't be as it is an autofocus fault....
Posted by kiwao on 25/10/2011 - 12:12
k5 af adjustment
I thought the adjust all and adjust each wasn't cumulative ? Pete You are correct it isn't. I do not know how they will adjust it. I thought that if I was having to dial in so much adjustment that there may be a fault in the lens but they assured me that it can't be as it is an autofocus fault....
Posted by JohnX on 25/10/2011 - 12:33
k5 af adjustment
Poor AF indoors was an issue, corrected wholly or partially in a recent firmware upgrade. Thanks this is good to know. Obviously my daughters piano recital is indoors so I hope it is ok. As for the focus issue I will just have to cross my fingers and hope it doesn’t affect adjustment of my oth...
Posted by kiwao on 25/10/2011 - 14:25
k5 af adjustment
Thanks again for the comments. Pentax fulfulled there promise of a quick repair. They replaced some parts in the camera body and seems to be working as it should. Just one thing I noticed when I got home that the image counter in the displays top right hand corner is at over 7900 which is ab...
Posted by kiwao on 30/10/2011 - 03:44
k5 af adjustment
Just one thing I noticed when I got home that the image counter in the displays top right hand corner is at over 7900 which is about 7700 more than it should be:shock:. I had had the camera 3 days and had shot about 200 images before I handed it over for focus adjustment. It was pointed out to me...
Posted by rlebleu on 31/10/2011 - 22:10
Infinity focus on 18-135
My 18-135 WR can never focus at infinity (typically sky) even on a bright day. If you have this lens can you confirm if this is the same for you?
Posted by DaveN on 26/10/2011 - 17:30
Infinity focus on 18-135
I can tell you the review sample I had showed no problem focusing on infinity. I wouldn't expect there to be a problem so you may have a faulty and/or damaged lens.
Posted by johnriley on 26/10/2011 - 17:40
Infinity focus on 18-135
I wonder if others can confirm /refute what John said above. It can focus on clouds, but if the sky is completely blue it won't focus. Similarly, won't focus on a uniformly cream coloured wall 6-7 feet away. Otherwise, I can't fault the lens.
Posted by DaveN on 26/10/2011 - 17:59
Infinity focus on 18-135
It won't focus on blue sky or on a uniform cream wall and I wouldn't expect any AF lens to do so. AF needs contrast and detail to work.
Posted by johnriley on 26/10/2011 - 18:05
Infinity focus on 18-135
Err My DA 18-55 WR and Sigma 10-20 does, so did my DA*300
Posted by DaveN on 26/10/2011 - 18:33
Infinity focus on 18-135
As John has said low contrast subjects are not the best to test the AF of a lens, at any distance. However I have a Pentax 50-135 away for repair at the moment that stopped locking on to focus at infinity. According to the repairer it worked fine on his calibration machine, but not on my K5 and K20....
Posted by bforbes on 26/10/2011 - 18:44
