Search results for 'back focus' - page 1146
Difference between m and a
Thanks for the posts guys. I am currently bidding for 1 on eBay at the moment. If I am not successful I will get back to youI've got about 4 Pentax-A 50mm f/1.7's mostly on bodies. All of them are in excellent condition and if you want one I could sort out a good one for £39 posted. Both caps incl...
Posted by mattox on 05/11/2014 - 14:31
Dropped my lens
I dropped my camera with my Tamron 24 - 135 attached. When I checked it I found that the, for want of a better word, small black circlip surrounding the rear element had come off. The lens appeared to work correctly without it although I have managed to get it back in place. It only appears to be t...
Posted by davidaitch on 04/11/2014 - 15:31
Dropped my lens
A few years back I dropped my Tamron 24-135mm and after shooting with it I noticed the lens was misaligned at the long end. Tamron couldn't fix it as it was too old. It maybe due to the angle but that rear element doesn't look central to me, it's off to one side.
Posted by Mike-P on 05/11/2014 - 18:02
Dropped my lens
Circlips get distorted when put in place and then removed but if this circlip is loose you might be able to find one of the right size on eBay (etc.). If not, try stretching the looped ends apart to make the best "circle" you can (a small vice would be handy to do that) and then fixing it back i...
Posted by jeallen01 on 05/11/2014 - 19:46
Confused - help needed with new/first lens purchase!
I am about to buy my first lens (other than the 18-135 WR lens I bought along with my K5II). I want a lens which will allow me to take photos of young kids indoors without having to use flash and also of my 5 year old niece's ballet shows. I was waiting for the Sigma 18-35 f1.8 to be reviewed with...
Posted by nj1975 on 11/11/2014 - 07:09
Confused - help needed with new/first lens purchase!
In my experience, the DA 35 Ltd is not slow to focus and is generally the lens I use for indoor shots of the kids and dogs. As an alternative to this - you could consider the Pentax DA 35 AL 2.4. This is a fantastic lens for the money - incredibly cheap (less than £120) and reportedly delivers I...
Posted by fritzthedog on 11/11/2014 - 08:06
Confused - help needed with new/first lens purchase!
The perception that the DA35 is slow to focus is simply because it has a very long focus range to get through when it is focusing. Most lens have a far shorter "throw" so will lock focus quicker, if the DA35 Macro doesn't hit the focus spot on it's first attempt then it will take a bit longer to get...
Posted by LennyBloke on 11/11/2014 - 08:23
Confused - help needed with new/first lens purchase!
50mm 1.8 Pentax - for indoor family, baby, pets, kids shots - just a beautiful little lens at a beautiful little price - very usa le wide open nd sharp as a tack with great broken. Originally consigned to a drawer now won't bee seen without it. For Ballet shows providing the shooting dista...
Posted by Daronl on 11/11/2014 - 08:58
Service Cost
JPsolutions are the official Pentax repairers and if you send anything to SRS they will just forward it on. I sent my 50-135mm in for a new SDM motor last year and if I remember correctly it cost approx £200 but you can get a 20% discount if you take out the forum plus membership (£10) I had mine re...
Posted by gtis on 12/11/2014 - 19:46
Service Cost
Sent my DA*16-5- * 50-135 off to JPS last year, both had their SDM motors replaced, and the 16-50 had its Zoom mechanism reassembled, I think the total cost was @£370 for both lenses, and they come back all adjusted correctly & with a 6 month warranty..... I thought it was reasonable value, the len...
Posted by andy_bell on 13/11/2014 - 08:12
DA* 16-50 & 50-135 SDM problem.
I use my 50-135 every month at the kart track and rattle off in excess of a 1500-2000 photos each time, all using the SDM to focus. Last month I took 2,491 photos of which circa 2000 were on my K-3 with the 50-135. Not a hitch.
Posted by SteveEveritt on 23/11/2014 - 09:29
Pentax lenses on other cameras
I have an Olympus E-M1 and use several Pentax as well as other marque lenses on it. All you need is a Pentax to m4/3 adapter which you can pick up on ebay for about £12 or there abouts. Easy to focus using magnify or focus peaking. You won't get stabilisation on your Panasonic so need to be aware o...
Posted by Hazza on 17/11/2014 - 11:22
SDM to Screw Drive or Not
I had a go at converting my 50-135 to screw drive the other day to compare focus speed. I recorded the full focus travel back and forth a few times using the lens on a K3. Video was recorded at 30 fps and played back frame by frame to get results. Full focus travel, infinity to near (results were...
Posted by richardmills on 17/11/2014 - 22:53
Setting 50 1.7 to the k5
It's an A type lens, so with the lens aperture ring set to A the camera can control aperture directly, and all the auto-exposure modes will work. If shake reduction is on then you will be prompted to enter the focal length when switching on each time. You don't need to make any custom setting ch...
Posted by McGregNi on 23/11/2014 - 08:43
Setting 50 1.7 to the k5
Except manual focus
Posted by SteveEveritt on 23/11/2014 - 09:31
Contax/Yashica (C/Y) to Pentax K adaptors
I converted a Contax 35mm using the Leitax lens mount converter. The process is fairly simple and the instructions comprehensive. It's a good lens which I still use, and if converted carefully and parts kept after removal I would imagine a retro conversion back to Contax mount should be possible. ...
Posted by merryhampton on 12/12/2014 - 20:06
tv lens
Many CCTV lenses are CS rather than C mount. Exactly the same thread but a further reduced rear focusing distance. Normal C mount must be ~17.5 mm in front of the sensor for infinty focus, CS reduces this by 5mm. Coverage varies considerably but I don't think any are designed to cover more than a 1...
Posted by petrochemist on 25/11/2014 - 12:18
300 or 200 with 1x4
Hi Dave I had the DA* 200mm and the HD 1x4 TC, they worked very well together, I lost a stop of light, but that was the only downside. focus and IQ were no different to my eyes. The DA* 300mm is a great lens and from what others have said on this forum it is great with the HD 1x4 TC optically. If...
Posted by Fletcher8 on 26/11/2014 - 19:26
300 or 200 with 1x4
Hi Dave I had the DA* 200mm and the HD 1x4 TC, they worked very well together, I lost a stop of light, but that was the only downside. focus and IQ were no different to my eyes. The DA* 300mm is a great lens and from what others have said on this forum it is great with the HD 1x4 TC optically. If...
Posted by FAT8BIKER on 30/11/2014 - 22:28
Travelling
I have just recently come back from Hong Kong & Macau. I took a Sigma 17-50 F2.8, a DA* 50-135 and Tamron 1.4x teleconverter (as well as a large sensor compact with a fast and wide zoom lens). Apart from the Grand Prix in Macau I used only the Sigma 17-50 and the compact (which have similar focal...
Posted by percy on 29/11/2014 - 11:30
