Search results for 'back focus' - page 1219
16-50mm f2.8 with a AF focus issue
Follow-up for Mike-P - I did indeed get in touch with Haris What a nice chap, only asked for postage and converted my non-working lens to screw drive. I just got it back from him and it's like a new lens. Faster AF than it's ever been. I didn't realise it was just a software thing, thought it in...
Posted by gtis on 12/06/2021 - 21:14
16-50mm f2.8 with a AF focus issue
Glad you got it sorted :D
Posted by Mike-P on 13/06/2021 - 09:04
250mm limit
We feel really privileged - happened to chance on a Red Kite near Millington Woods this afternoon and spent 10 minutes watching the magnificent bird swirling across the fields looking for food (usually we see such wonderful birds and they disappear immediately). They say a picture paints a 1,000 wor...
Posted by GrumpyGrandPa on 16/06/2021 - 20:22
250mm limit
The focus on the second shot isn't too far off either, so it's a pretty good attempt! As the above posters have said, a higher shutter speed will be very useful here.
Posted by HarisF1 on 16/06/2021 - 22:43
250mm limit
As above and also continuous focus, single point focus and look at " back button focusing " a technique in keeping your thumb on the " AF " button which will keep the camera in constant focus mode with your trigger finger on the shutter button. The shot below was with a 150mm lens plus a decent c...
Posted by Chrism8 on 17/06/2021 - 06:45
250mm limit
The focus on the second shot isn't too far off either, so it's a pretty good attempt! As the above posters have said, a higher shutter speed will be very useful here. You didn't say that it was a great camera that I am using - I got it from you Christmas time 2016! Im still getting to grips with ...
Posted by GrumpyGrandPa on 23/06/2021 - 19:15
Bigger lenses
I have some big lenses, so hopefully can offer an additional viewpoint and a few things to consider. Photographing birds in flight, and with a messy background is not easy. with your tamron and much of the recommendations offered the fastest aperture is f5.6, which affects shutter speed and ISO ...
Posted by Pwynnej on 23/06/2021 - 14:50
Bigger lenses
As I suggested in your '250mm limit' thread, one of the Pentax 55-300mm lenses is a good starting point. Apart from anything else, get one with quick-shift (not sure whether they all have it) and you can manually tweak focus if auto-focus is having trouble (as it very often will if the background is...
Posted by Lubbyman on 23/06/2021 - 17:29
Bigger lenses
Mike Thanks. Your comment "only converter I used with it was the Pentax, partly because the IQ was very slightly better than the sigma converter" seems to mirror my experience with my own V2 100-300 - but that was based on only a very brief comparison of the combos in our back garden (due to l...
Posted by jeallen01 on 17/07/2021 - 18:19
New HD 16-50 in August?
I have the 16-85mm but it lacks the speed I want in a standard zoom, though I keep it for the range and WR. The Sigma 17-50/2.8 is absolutely superb but to have a good range, speed, WR and great optics (and a reliable focus motor) would really be something.
Posted by Jonathan-Mac on 04/07/2021 - 16:39
The new DA* 16-50mm f2.8
So the recent trend in Pentax pricing is for APS-C gear to be significantly more expensive than the FF equivalents? Optically, the closest FF lens to the new 16-50 is the 15-30 f2.8 and that's about the same price. Comparing with the FF 24-70 is a bit of a red herring, optics cares nothing for senso...
Posted by Lubbyman on 15/07/2021 - 16:14
The new DA* 16-50mm f2.8
Apologies, Steve - the response giving an explanation to my query was yours, thank you. No problem. In my world, explanations stand (or fall) on their own merits and don't depend on who said them. A possibly relevant observation: Back when the K3III hit the (metaphorical) shelves and UK/Euro pric...
Posted by Lubbyman on 15/07/2021 - 22:35
Opinion of D FA 28-105 v D FA 24-70
I'm interested to know the opinions of those of you who have owned both these lenses, particularly from the point of view of using as a "walkaround" or general use lens with a K1. Do you fell that the 24-70 is significantly better optically? How does the 28-105 perform wide open? Any other aspects t...
Posted by PeterKR on 05/11/2022 - 22:09
Sigma EX 50-500mm F/4.5-6.3 APO HSM DG OS on ebay
At the back end of May this year I purchased a Sigma 120-400 for use with my K1. When it arrived I found that although it worked perfectly on my K3, it would not work at all with the K1 and the mount too was the original which did leave a small scratch on the K1. Following some research I learned th...
Posted by Defragged on 12/08/2021 - 10:10
Sigma EX 50-500mm F/4.5-6.3 APO HSM DG OS on ebay
Yes it's the last version, bit rough though isn't it. Missing the hood extension for APS-C bodies, box, strap, case and front cap. If you are thinking of using it on a K-1, KP or newer then be careful of the mount. Also don't forget Sigma no longer service or repair Pentax mount lenses. TBH I wou...
Posted by jeallen01 on 12/08/2021 - 14:18
Tokina 500mm Mirror Lens Focus Seized-up
I've had a Tokina 500mm Mirror Lens for a while, but it's not been used for a couple of years. I got it out to try it with my K3-3, but the focus has seized solid. - I can't move the barrel at all. The lens has been in a drawer since last used, so it's not been dropped or otherwise abused. Anyo...
Posted by longbo on 23/08/2021 - 20:25
Tokina 500mm Mirror Lens Focus Seized-up
It may be dried lubrication in the focusing helicoid. This might be helpful https://www.flickr.com/groups/strobist/discuss/72157604235612536/ https://www.dpreview.com/forums/thread/2554136
Posted by smc on 24/08/2021 - 05:01
Tokina 500mm Mirror Lens Focus Seized-up
Thanks for the info. I'll give it a go.
Posted by longbo on 24/08/2021 - 05:30
Tokina 500mm Mirror Lens Focus Seized-up
Any luck?
Posted by smc on 05/09/2021 - 20:27
Tokina 500mm Mirror Lens Focus Seized-up
smc Thank you for taking the time and trouble to follow-up. I found more detailed information about dismantling the lens on the Pentaxforums website and managed to take it apart sufficiently to gain access to the helical thread. There, I applied heat from my wife's hairdryer, which persuaded ...
Posted by longbo on 05/09/2021 - 22:30
