Search results for 'back focus' - page 1020
Teleconverters - again!
Hi All I am in the fortunate position of being able to spoil myself. I currently have a K5- and a K-r for backup with a variety of lenses (see below). I am delighted with both the Sigma 70-200 f/2.8 and the Pentax DA* 300 f/4 but need that extra bit of reach as most of my photography is wildlif...
Posted by eoinandpaula on 01/01/2012 - 17:44
Teleconverters - again!
There is the Sigma above and recently I hired a DA* 300mm from SRS and found it worked well with my 1.5x Kenko teleconverter, including autofocus. Were you using SDM or Screw drive for the auto focus on the DA300. The reason I ask is that I was using the the same combination with SDM and found it sl...
Posted by bforbes on 02/01/2012 - 00:01
Teleconverters - again!
with the Pentax 60-250 f/4 provided there was a teleconverter that would work with the 60-250 and still give me fast auto focus. Is there such a teleconverter or am I asking too much? Or can anyone recommend a 200-400 or similar with a Pentax fit? 60-250 is a very slow focusing lens alone (SDM is ...
Posted by piotro on 02/01/2012 - 12:06
Teleconverters - again!
Thanks for all the info - especially the DA*300 aqnd Tenko 1.5 combination. Previously I had the Sigma 150-500 but was never really happy with it. When I first had it, it was mounted on a K-7 and I was not satisfied with the quality of almost all the images that I took. I did send the K-7 bac...
Posted by eoinandpaula on 03/01/2012 - 09:17
Teleconverters - again!
There is the Sigma above and recently I hired a DA* 300mm from SRS and found it worked well with my 1.5x Kenko teleconverter, including autofocus. Hi, its me again I have just had a long discussion with SRS who were very helpful to the extent of getting a Kenko 1.4 (no 1.5 in stock), K-5 and DA*3...
Posted by eoinandpaula on 04/01/2012 - 12:18
Teleconverters - again!
Hi I am no expert - but can share my experiences, which will hopefully help. The currently manufactured Kenko TC's (1.4 and 2x) do NOT have the SDM/HSM contacts (the two square gold contacts on the inner of the lens/camera body - some distance from the outer bunch of standard contacts). The...
Posted by LSJ on 04/01/2012 - 13:01
Teleconverters - again!
Some notes about early converters which work with SDM that I found by experience: There's no way of setting the SR to the required focal length, the camera automatically detects the FL of the master lens and no way to override it. When hand held the DA*300 tends to hunt just either side of the...
Posted by johnwhit on 04/01/2012 - 13:25
Teleconverters - again!
There is the Sigma above and recently I hired a DA* 300mm from SRS and found it worked well with my 1.5x Kenko teleconverter, including autofocus. Hi, its me again I have just had a long discussion with SRS who were very helpful to the extent of getting a Kenko 1.4 (no 1.5 in stock), K-5 and DA*3...
Posted by dcweather on 06/01/2012 - 00:12
Teleconverters - again!
There is the Sigma above and recently I hired a DA* 300mm from SRS and found it worked well with my 1.5x Kenko teleconverter, including autofocus. Hi, its me again I have just had a long discussion with SRS who were very helpful to the extent of getting a Kenko 1.4 (no 1.5 in stock), K-5 and DA*3...
Posted by dcweather on 06/01/2012 - 00:20
Teleconverters - again!
i cannot find the manufacturer ,but i have a Jessop badged MC 1.7X Pz/AF tele-converter made in japan. it has the 7 contacts plus the sdm contacts, tried on my DA*16-50 and it works including af, only tried in a not very bright room and it hunted, when there was decent contrast difference it found...
Posted by redbusa99 on 06/01/2012 - 00:38
Teleconverters - again!
i cannot find the manufacturer ,but i have a Jessop badged MC 1.7X Pz/AF tele-converter made in japan. it has the 7 contacts plus the sdm contacts, tried on my DA*16-50 and it works including af, only tried in a not very bright room and it hunted, when there was decent contrast difference it found...
Posted by johnwhit on 06/01/2012 - 07:09
Portrait lenses above 50mm
I have a 50mm FA 1.4 that I really like but I cannot use it for head shots as it will give some perspective distortion. I need something a little longer that will land me right in the perfect focal length range of around 85mm. So working that back I would need something around 57mm on my crop sen...
Posted by Daydreamjay on 01/01/2012 - 20:46
Portrait lenses above 50mm
As has already been stated : 50-135 / 50-150 (Sigma) / 77 Ltd or MF lenses such as the Voigtlander 58-1.4 / Cosina 55-1.2 / Leica 60 or Zeiss 85 (maybe even the much cheaper but also very good Voigtlander 50.1.8 ). For portraits you may consider the soft focus lenses such as the Pentax two 85 ...
Posted by Frogfish on 02/01/2012 - 06:53
Portrait lenses above 50mm
Regarding the crop factor and image distortion, although a 50mm lens remains a 50mm lens that has nothing to do with perspective distortion. Perspective relies entirely on the distance we are from the subject, nothing else. A 50mm lens will require us to move back to get all the subject in (compared...
Posted by johnriley on 02/01/2012 - 09:34
Portrait lenses above 50mm
Regarding the crop factor and image distortion, although a 50mm lens remains a 50mm lens that has nothing to do with perspective distortion. Perspective relies entirely on the distance we are from the subject, nothing else. Thank you John, I can see that now. We have to move back with our APS-C SLR ...
Posted by Dave-L on 02/01/2012 - 14:09
Portrait lenses above 50mm
Apologies I'm a bit late coming into this thread. Back in the summer I was looking for a decent portrait lens for my K-5 and having read a few very good reviews, including John's own excellent review (is this only available to Pentax User Plus Members?) I choose the DA70mm F2.4 limited. For perfo...
Posted by GlynM on 02/01/2012 - 21:31
Portrait lenses above 50mm
I use the 100 mm macro for portraits as well as the 35 2.4, 50 1.4 and 85mm soft. The DA Macro 100mm is utterly fantastic for portraits, but the focus can be be annoying I usually end up switching to manual - hopefully a lot faster with less back and forth hunting on the K5
Posted by Dodge69 on 02/01/2012 - 21:49
Portrait lenses above 50mm
dof is the same, min focus distance the same, with the Pentax af 1.7, your image quality is negligibly affected, still very high quality with most lenses, but you do lose some light, and increase magnification, but you also gain AF with fast lenses and that means a 50 1.4 or 85 soft (the two I use t...
Posted by Don on 03/01/2012 - 18:50
Portrait lenses above 50mm
The last one on eBay UK was here: If the link is broken look for Pentax F SMC 1.7X AF Adapter John
Posted by JAK on 03/01/2012 - 21:21
Portrait lenses above 50mm
Just to let everyone know I ended up buying a 50-135mm DA* as per the above post. I couldn't really afford it so I am having to sell my beloved GX20 to cover part of it (see classifieds.) :( I was tempted with ltd but I need a zoom lens ideally as I will use this in the studio on glamour shoot...
Posted by Daydreamjay on 16/01/2012 - 16:24
