Search results for 'back focus' - page 814
SDM issues? A straw poll.
Hi - Update on the attempted repair to my 50-135 DA* Joe Virgil (Pentax USA) responded today to my voice mail and is tracking down the lens to try and get it back by the 13th I can ask no more than that Thanks Mr Day and thanks Pentax USA (Joe Virgil)
Posted by Daronl on 08/10/2009 - 02:18
SDM issues? A straw poll.
Hi - Update on the attempted repair to my 50-135 DA* Joe Virgil (Pentax USA) responded today to my voice mail and is tracking down the lens to try and get it back by the 13th I can ask no more than that Thanks Mr Day and thanks Pentax USA (Joe Virgil) Indeed! :D Fingers crossed. :wink:
Posted by RichardDay on 08/10/2009 - 19:12
SDM issues? A straw poll.
I purchased the 50-135 from Amazon here in the U.S. aprox. 1.75 years ago. after about 1.5 years the sdm motor started getting sluggish and requiring more and more time at startup to respond at all. First about 5 seconds, and ultimately over a minute and then not working at all requiring manual focu...
Posted by sandpipe on 07/05/2010 - 14:30
35mm macro
Yes, the DA35 Limited macro is a wonderful lens. The things that I like about are: 1) it is almost the "standard" view lens yet with close focus ability, 2) It is relatively small 3) The IQ is outstanding on all accounts, sharpness, bokeh, colour rendition, CA, contrast. Even though I have the...
Posted by Lance B on 30/09/2009 - 23:59
35mm macro
After a couple of months of ownership (where it's rarely left the camera) I have to agree with everything said in the linked article - I really am struggling to find a weak spot with this lens. 1. It's bad for manual focusing in any but the macro range. Since I often skip AF, this was an issue for m...
Posted by hefty1 on 01/10/2009 - 00:06
35mm macro
I've been using the Sigma 70mm macro a lot and finding it very good, perhaps a little on the long side but I can usually take a step back. See my post "Not Macro!" in the Your photos forum. :D
Posted by mr.mellow on 01/10/2009 - 11:15
Pentax 12-24 Prices
Amin I had been thinking about selling my sigma 10-20 and going for the 12-24, but I have a lot of old stuff I want to sell so if and when I sell it I will get back to you for sure, Jack. just a bit busy just now with other stuff.
Posted by jackitec on 30/09/2009 - 16:52
Going on vacation and need advice on lenses
George and Don have pretty well summed up the lenses you should be looking for. I wouldn't get too hung up on "weather sealing". None of the best photographs taken up till now have been taken through weather-sealed glass. Look after your lenses and they'll look after you. If it rains, stick your cam...
Posted by Aero on 30/09/2009 - 23:57
Going on vacation and need advice on lenses
The new WR lenses are also very easily distinguishable because they have a (very smart) knurled rubber finish to the zoom and focus rings, as opposed to the ridged design of nearly all the other Pentax lenses.
Posted by JonSchick on 02/10/2009 - 14:00
SDM issues - Part II
16-50mm s/n 9028666 so probably about 10-12mths old. It was a used item so I do not know previous history. SDM just stopped working and nothing I did would bring it back to life.
Posted by aybee on 01/10/2009 - 19:10
Carl Zeiss Jena Pancolar 1.8/50mm
Where's hefty when you need him.... :D I'm here and I do own both :) Firstly the optical construction is similar (both are 6 elements arranged in 5 groups) but the Zeiss has a cemented pair at the front while the Pentax has its at the rear. How this translates into real-world pictures is that I ...
Posted by hefty1 on 01/10/2009 - 18:55
Carl Zeiss Jena Pancolar 1.8/50mm
Wasn't it an optional standard lens on a Practica or Exacta? Yes sort of; the Praktica M42 cameras (LTL, MTL, etc) came as standard with a Meyer Domiplan 50/2.8 - quite possibly the worst lens to grace a camera short of the sort of thing you'll find in an cheap mobile phone these days. For a fee you...
Posted by hefty1 on 01/10/2009 - 20:45
Carl Zeiss Jena Pancolar 1.8/50mm
Well Hefty what can I say but a heart felt thanks, all I ever needed to know about M42 manual 50mm lenses, unfortunately you've mudded the waters as now I've got to go searching for the said lenses as described above, doh. If you want to do it on the cheap then the Pentacon 50/1.8 can usually be had...
Posted by hefty1 on 01/10/2009 - 23:12
pentax Fa 75 - 320 lens
Can anyone advise, can i fit an older film lens (pentax Fa 75 to 320) to my gx 10 and will it autofocus. I have updated the camera to ver 1.3 flash bios. I currently have the 18 to 55 and 50 to 200 kit lenses, i am looking for a little more reach the 320 would give me this, but i am not up to man...
Posted by suds on 01/10/2009 - 22:57
SDM Lenses
The motor used in the Pentax SDM lenses does use an supersonic drive system, it's just that it's a small supersonic "micro" motor similar to those used by Canon in some of their their USM lenses that don't feature the larger ring design which is much larger, much faster and more expensive. Stefans p...
Posted by RichardDay on 03/10/2009 - 17:42
SDM Lenses
Do those Canon and Nikon lenses that use "ring" motors offer the ability to focus with non-USM enabled bodies? G
Posted by George Lazarette on 03/10/2009 - 18:52
SDM Lenses
Just an aside I believe Olympus also use ring motors in their SWD lenses and they are not just reserved for the larger-longer focal length zooms. I can testify that they are blindingly quick, weather and dust sealed too. George, I think you are correct regarding seals and focus motor capacity, i...
Posted by Greytop on 03/10/2009 - 19:12
SDM Lenses
Do those Canon and Nikon lenses that use "ring" motors offer the ability to focus with non-USM enabled bodies? G George, I may well have this wrong but the cheaper Nikon bodies, D40, D60 etc. will only work with USM lenses. To keep the price low, they have no internal motors. The higher end camer...
Posted by K10D on 03/10/2009 - 19:29
SDM Lenses
Apologies for the lack of research before asking this... ... but is it possible to force an SDM lens that can use the body's screw drive on a non-SDM-enabled body, to use the screw drive on an SDM-enabled body? There are now two types of K mounts that use a SDM motor the KAF2 and KAF3. The KAF2 a...
Posted by Anvh on 03/10/2009 - 20:10
SDM Lenses
As for enabling KAF2 lenses to use screwdriver the answer is no. The lens has a digital contact with his ID and info what the lens can, if the camera knows it has a SDM it will use that. You might disable the digital-info contact but with that you will also lose the ability to autofocus since the ...
Posted by Mike-P on 03/10/2009 - 20:48
