Search results for 'back focus' - page 1155
AF problem on Pentax 18-135
hello, just to say i got the same problem on my 18-135 : between 18 and 24 the lense can't focus at a distance over 2 meters, under this distance, it works better, when the subject is in dark light, the autofocus works better !!! it seems that the IQ is very poor at this range did "digitalK...
Posted by fitou29 on 22/07/2017 - 11:24
AF problem on Pentax 18-135
hello, just to say i got the same problem on my 18-135 : between 18 and 24 the lense can't focus at a distance over 2 meters, under this distance, it works better, when the subject is in dark light, the autofocus works better !!! it seems that the IQ is very poor at this range did "digitalK...
Posted by JAK on 22/07/2017 - 11:49
AF problem on Pentax 18-135
thanks Jack for your response, it's impossible to focus manually when automatic don't succeed in my case it's not a contact issue. it seems to me that the manual focus ring cramp the automatic focus mecanism, as I feel the ring moving when autoatic focus doe's not work when it's ok, the ring doe...
Posted by fitou29 on 26/07/2017 - 08:33
AF problem on Pentax 18-135
My location is in France nearby Rennes. and for pentax france the repairing company is "PM2S" but onee I need their services for a flash problem : I let my K5 and the af360fgz flash during one month for investigation , and they send them me back , whith the following diagnostic : all is ok. but t...
Posted by fitou29 on 31/07/2017 - 17:34
Bell and Howell lens.
Hello there, Can anyone help please. I have been given an old Bell and Howell lens. 70-210 mm fits the K-5 perfectly and focus well manually. It says it has a macro but I cannot get it to work. Anyone got this old lens and how does it "go" macro Any help would be a great help Trixie
Posted by trixie on 29/03/2015 - 14:13
Bell and Howell lens.
There might be a button on the focus ring that when pressed allows you to turn the focus ring past the normal end stop. Similar idea to setting an aperture ring to 'A'. OR, being a 'trombone' zoom, try pushing/pulling the zoom and see if it reveals a macro range.
Posted by JohnX on 29/03/2015 - 15:02
Bell and Howell lens.
Although it will say macro it will be more of a close focus option as I don't think there is such a thing as a zoom lens with a true macro facility. On the focus ring do you have a scale that allows you to focus a bit closer when you go into it?
Posted by Mike-P on 29/03/2015 - 18:21
Bell and Howell lens.
it could be the same as the Pentax A 70-210, you can only turn the focus into the macro area at 70mm then you have close focus adjustment within a limited area, on the Pentax there is an indicator under the word MACRO and that is the limit of the close focus.
Posted by redbusa99 on 29/03/2015 - 20:17
Bell and Howell lens.
Thank you all so much It is a good sharp and clean lens and did close focus at 50mm once again thank you for the help appreciate it. Trixie 8)
Posted by trixie on 29/03/2015 - 22:01
Bell and Howell lens.
Thank you all so much It is a good sharp and clean lens and did close focus at 50mm once again thank you for the help appreciate it. Trixie 8) A 70-210 that can close focus at 50 is pretty special :D
Posted by fritzthedog on 30/03/2015 - 13:22
DA*300mm with Pentax HD 1.4x converter + Pentax 1.7x AF converter
This was taken with a K3 and DA*300mm with Pentax HD 1.4x converter + Pentax 1.7x AF converter. This combo works out at 1071mm F8 at 35mm equivalent. The combo did try and auto focus but didn't hit the focus very often so I switched to manual focus. Not razor sharp but could be used in an emergen...
Posted by mille19 on 29/03/2015 - 20:46
Sigma 100-300F4 (w & w/o TC) V 150-500HSM - Focus speed
Think some people might be interested in reading the thread on the above that I just posted on the US forum to see what they have to comment about the situation! http://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/291943-sigma-100-300f4-w-w-o-tc-v-150-500hsm-focus-speed.html
Posted by jeallen01 on 30/03/2015 - 10:28
Sigma 100-300F4 (w & w/o TC) V 150-500HSM - Focus speed
I also have both and the 150-500 is a lot slower ( also a slower lens re F stop, and covers a larger zoom area which probably doesn't help). the 150-500 reminds me of Pentax SDM speed. From my experience Sigma HSM is quick on the F2.8 lenses, 50-150 and current 70-200 but seems slower on the oth...
Posted by carmagw on 30/03/2015 - 10:41
Sigma 100-300F4 (w & w/o TC) V 150-500HSM - Focus speed
I also have both and the 150-500 is a lot slower ( also a slower lens re F stop, and covers a larger zoom area which probably doesn't help). the 150-500 reminds me of Pentax SDM speed. From my experience Sigma HSM is quick on the F2.8 lenses, 50-150 and current 70-200 but seems slower on the oth...
Posted by jeallen01 on 30/03/2015 - 10:44
Sigma 100-300F4 (w & w/o TC) V 150-500HSM - Focus speed
Take a look at the last-but-one post in the thread I linked - "we are not alone"!
Posted by jeallen01 on 01/04/2015 - 21:22
Sigma 100-300F4 (w & w/o TC) V 150-500HSM - Focus speed
I was never imagine rested with the fbest cussing speed on sigma 100-300mm f/4 hsm nikon mount lens. Even after service by sigma I was still disappointed by it.
Posted by cabstar on 03/04/2015 - 00:46
150-600 tamron/sigma
I bought the Sigma 150-600mm sport for my 7D and it's a very nicely made lens. Only trouble is it weighs a ton and it's very average on anything that doesn't fill at least half the frame at 600mm. It's going back to Amazon Tuesday and I will carry on waiting for the 150-450mm Pentax lens. Meanwhi...
Posted by Mike-P on 03/04/2015 - 12:58
DFA150-450 informal "test" images
What is a dam lens? One especially developed to photograph dams? I don't think so. Not much call for that. Or is it a lens made from boulders and concrete? :D No, I would guess hat a DAM lens is a Manual focus Automatic aperture Digital only lens ? Peter
Posted by PeterKR on 06/04/2015 - 10:31
DFA150-450 informal "test" images
The photographer whose images I linked in the opening of this thread, has posted some more images during the day. Some of the images have been taken with the DFA150-450 + 1.4x converter. He has specified the basic exif details below each image. The DAM* lens 8) looks promising. Hopefully the DFA150-...
Posted by bjolester on 06/04/2015 - 17:35
Lens information would be lovely.
Pentax Forums (an excellent resource for Lens info) has the following.... http://www.pentaxforums.com/lensreviews/SMC-Pentax-A-28-135mm-F4-Zoom-Lens.html Hope this helps. BTW, PentaxForums.com is an OK site, pretty friendly (not quite up to standards here of course) but more US biased than th...
Posted by StephenHampshire on 12/04/2015 - 14:10
