Search results for 'back focus' - page 1176
SMC M lenses
You're right Andrew, it's a very good feature. I've also found the same as you, not so good at 28mm but it works well with my Tamron Adaptall 135mm. I'd say catch in focus is perhaps not so suited to something like a party where I find you have to 'focus past' people first to get the one you want...
Posted by McGregNi on 03/06/2016 - 10:09
SMC M lenses
There is another aspect to this question of older lenses which has been the dominating factor in my using pedominantly cheap prime 'm' or 'a' lenses, that being the variable quality control that seems to bedevil not only 'AF zoom' lenses, but the cameras themselves. When buying anything resarch int...
Posted by frob on 03/06/2016 - 10:22
SMC M lenses
I use more manual than auto lenses but, that said, if a faster focus is needed, my old eyes can't cope and so I use a Tamron 28-200 AF. Otherwise, I absolutely adore my extensive collection of MF lenses and I match them to the task in hand. As to John's comment regarding how hard people have used ...
Posted by davidwozhere on 03/06/2016 - 23:05
Is the 150-450mm sharp at 450mm wide open?
John's comments on subject movement is very important to this discussion and as any zoologist will explain, wild creatures that are continually faced with attack from predating species actually are in continual scan mode. Watch a solitary blue tit before it exposes itself to a potential predator ...
Posted by Daronl on 25/05/2016 - 11:59
Is the 150-450mm sharp at 450mm wide open?
Don't know what's going on with the Dove but could the rabbit be a focusing issue? you will get a marginally better DoF on the 6.3 shots and that may be why they appear sharper. Try a focus test and if out try calibrating the lens to the body.
Posted by fatspider on 25/05/2016 - 21:50
Is the 150-450mm sharp at 450mm wide open?
Don't know what's going on with the Dove but could the rabbit be a focusing issue? you will get a marginally better DoF on the 6.3 shots and that may be why they appear sharper. Try a focus test and if out try calibrating the lens to the body. I wondered about that but thought the difference was ...
Posted by NeilP on 25/05/2016 - 22:13
Is the 150-450mm sharp at 450mm wide open?
Hi Neil, If it is clear that this is repeatble under controlled conditions; Eg: taking 20 test shots of a static subject -10 off at 5.6 and 10 off at 6.3 , with the camera fixed on a tripod , with the focus points set at 9, then I agree, there is an equipment issue, most likely the lens. My 15...
Posted by Daronl on 26/05/2016 - 01:38
M42. To k mount adapter
I am hoping to acquire on of these adapters . I like to use " catch in focus" when using manual focus lens , and am wondering if an m42 lens would work using this mount. If anyone has any knowledge of this . Regards
Posted by theonenadeem on 25/05/2016 - 01:06
M42. To k mount adapter
I don't see any reason why it should not. I use a lot of manual old glass and the focussing system does just the same as it does with newer glass -- it bleeps with a green hexagon when it thinks the focus is OK. It will do exactly the same in reverse with catch in focus. Instead of you twiddling the...
Posted by davidwozhere on 25/05/2016 - 01:36
M42. To k mount adapter
Ye it will work just fine. The simple and well made Pentax Adapter K is the best option, but not the cheapest of course, and will give infinity focus. M42 lenses work more conveniently than M series K mount ones. These are all non-electronic so the DSLRs cannot stop them down in the usual way, bu...
Posted by johnriley on 25/05/2016 - 08:42
K1+150-450+Pentax1.7x
Since the DA1.4x does not work on FF, thought it was worth trying the old 1.7x. My impression is it's easier to use on the K1 than the K20 / K5 with the DA300 or Sigma 150-500, as far as I can remember. Less pre focus seemed to be required and the auto-focus snapped in quicker. The exif for th...
Posted by bforbes on 28/05/2016 - 12:41
Damn you SDM
SDM failure is not just isolated to the DA* lenses, I looked at a 17-70 as a back up while my 16-50 was at JPSS. Was about to hand over the plastic at Richmond Jessops (Jessops Mk1) and I asked to try the lens... nothing...and it was a display model....
Posted by ilovesaabs on 08/08/2016 - 11:50
Vivitar 2 X converter - not compatible?
I have a Vivitar 2 X tele converter which served me very well in the film days, fitting between my old K1000 and a variety of lenses. It doesn’t seem to work on my K-x. I have tried it at the back of the Pentax 18-55 zoom, the Pentax DA*300mm and a Vivitar 135mm telephoto. Whether the camera is set ...
Posted by grambuch on 05/06/2016 - 18:14
CIF
More recently I am using manual focus lens with CIF and like the results , but still developing my skill I am currently looking at at an M24-50 f 4 . However would i be able to use CIF in a studio? As I believe i can shoot in Manual mode in A studio and Catch In Focus only works in AV mode. R...
Posted by theonenadeem on 07/06/2016 - 23:43
CIF
I don't think the exposure mode matters .... Perhaps not green mode, but I've used M mode with catch-in-focus many times. M mode is the only mode that works with non A-type manual lenses , with stop-down metering. The main setting to remember, once CIF is enabled in the menu, is to use AF.S autofoc...
Posted by McGregNi on 08/06/2016 - 07:53
New HD PENTAX-DA 55-300mm f/4.5-6.3 ED PLM WR RE
Probably get more useful info on this Bill from the US Pentax Forum as they seem to be given a higher priority and are 'closer to the coalface' than us back here in Blighty. Personally, this new developed lens looks like it could be quite interesting particularly because of its potential improvem...
Posted by 1stEverPentax on 11/06/2016 - 11:32
New HD PENTAX-DA 55-300mm f/4.5-6.3 ED PLM WR RE
Hi. I recently purchased in of these lens from B&H in New York and have noticed some weird focusing behaviour. It is paired with my k3ii. When I try to take photos at 300mm it won't focus at infinity either on auto or when using the manual focus ring. If you back it off to 280 ish it seems to wo...
Posted by Nicgreene on 10/08/2017 - 20:31
New 55-300 - No aperture lever!
For those wondering why the new 55-300 PLM is incompatible with all but the latest models, here's why - it has no aperture lever! Whilst this might be annoying for a lot of pentaxians the good side of this is possible future 3rd party lens compatibility. Why? It has been said on record b...
Posted by Unlocker on 13/06/2016 - 10:57
New 55-300 - No aperture lever!
It mentions Firmware updates so I would assume compatability will depend on which contacts are used to operate the aperture and also how far back Pentax are prepared (or can be bothered) to go in the model range. I would hope this is something that's been in development for several years and olde...
Posted by fatspider on 13/06/2016 - 12:51
Tamron 17-50 f:2.8 Focal Length
I've just got a new Tamron 17-50 and have just noticed that when set all the way over to 50mm it reports 34mm to the body, zooming slightly back from this length it is sending the correct information back to the body, all the way down to 17mm. I'm wondering wether to live with it rather than live wi...
Posted by worleyg on 15/06/2016 - 04:11
