Search results for 'back focus' - page 1896
Focus shift - can live view focus stopped down?
"It's not good for your health to investigate these things too deeply." Wise words softly spoken So apart from all the aforementioned, are you pleased with your new convenience travel zoom?
Posted by Nigelk on 25/10/2019 - 13:19
Focus shift - can live view focus stopped down?
It gets weirder. I've just tried at 270mm and found that the camera focuses slightly differently as you stop down. This suggests the firmware attempts to compensate for the focus shift. I never realised the camera took account of the aperture when focusing. It's cleverer than I thought. Only p...
Posted by pschlute on 25/10/2019 - 13:25
Focus shift - can live view focus stopped down?
It may well be worth testing this on another body too. How do you find the accuracy of TTL centre spot focussing with your K-5iis?
Posted by JAK on 25/10/2019 - 14:12
Focus shift - can live view focus stopped down?
The firmware will not be adjusting focus to account for "focus shift". Are you testing this scientifically ? At least 10 attempts for each setting otherwise the vagaries of AF accuracy (ie not very) come into play. Yes, I'm testing reasonably 'scientifically'. I first noticed it at a distanc...
Posted by WaypointCharlie on 25/10/2019 - 14:16
Focus shift - can live view focus stopped down?
So apart from all the aforementioned, are you pleased with your new convenience travel zoom? Yes, it's an improvement on my old 18-250mm which feels like it's about to die. It may not be the finest quality glass but competition judges don't seem to notice! Pity it's not weather sealed though. I...
Posted by WaypointCharlie on 25/10/2019 - 14:29
Focus shift - can live view focus stopped down?
I have no explanation, but doubt the firmware has anything to do with it. At 60cm you are only just inside the minimum focus distance, try at 15 feet or so. Also get the camera to focus each time from the extremities (infinity or closest distance). It does make a difference. I have calibrated 14...
Posted by pschlute on 25/10/2019 - 14:37
Focus shift - can live view focus stopped down?
Also get the camera to focus each time from the extremities (infinity or closest distance). It does make a difference. That's a big factor with some of my lenses. On the screw driven 18-250 I think it makes a difference of as much as 2/3rd depth of field (wide open). It's something I commented on...
Posted by WaypointCharlie on 25/10/2019 - 15:18
Focus shift - can live view focus stopped down?
This was from the 18-270mm this morning at 270mm and f/9.0. It's not going to be the finest lens at 270mm, but still useable I think. At this distance it didn't seem to front focus. Unless you have good light it means using a tripod if you want low ISO (this was 1/4s ISO 80). A tripod rather n...
Posted by WaypointCharlie on 27/10/2019 - 16:35
Focus shift - can live view focus stopped down?
This was from the 18-270mm this morning at 270mm and f/9.0 ...Unless you have good light it means using a tripod if you want low ISO (this was 1/4s ISO 80). A tripod rather negates a lot of the convenience of a 'travel zoom' - you might as well carry a better lens! At f/9.0 and ISO 80, any 270mm len...
Posted by Lubbyman on 27/10/2019 - 17:13
Focus shift - can live view focus stopped down?
Focus shift is where the point of focus varies slightly with the aperture used and therefore cannot be avoided by using live-view focusing, unless the lens is actually stopped down to the aperture to be used while it's focusing.
Posted by Jonathan-Mac on 28/10/2019 - 08:28
Focus shift - can live view focus stopped down?
Have you tried another camera yet to eliminate a problem with the one you normally use?
Posted by JAK on 28/10/2019 - 17:06
reviews and video settings.
I've been working on a project which includes employing a professional film maker to create a short movie. He is using one of the Sony XT mirrorless cameras. I have no interest in movie making at all, but we have to accept that convergence is one of the main technological trends of which the "smart ...
Posted by Don on 26/10/2019 - 18:20
reviews and video settings.
Actually there is a lot more to it, not all cameras perform equally well in stills either; if it is video you want then look elsewhere BUT if you want the best rendered landscape shots, astrophotography, buildings and interiors you would be hard pressed to beat the K1. Instead of complaining about P...
Posted by richandfleur on 28/10/2019 - 23:58
reviews and video settings.
IIRC Pentax was sort of ahead of the game once with the K20D; it was one of the first DSLRs that could sort of do video albeit at only 14 fps... Yeah they were totally up there back in the day and then just went nowhere after 2012, (which is of course around when Ricoh came on the scene). Film Riot...
Posted by richandfleur on 29/10/2019 - 00:07
reviews and video settings.
My twopeneth in here, Pentax need to hit the big market figures where wealth is growing. China, India etc. They need to be hitting huge numbers not necessarily with cameras but sport optics too. Acceptable video quality is part of this, like it or not it`s what a huge number of purchasers go for ...
Posted by cedricd on 11/11/2019 - 19:17
reviews and video settings.
14 years and 6000+++ posts earns me the right to have an opinion, even if a few stubborn mules don't want to hear it. :) going back to 2005 I predicted the rise of video and stills convergence and started giving Pentax feed back on where the future was going... I transfer images into a folde...
Posted by Don on 14/11/2019 - 20:35
Little live view A/F tip
Did you know in live view you can change the focus area and also the size of the area to focus on? My little vid 8)
Posted by cardiffgareth on 19/11/2019 - 19:58
Little live view A/F tip
No I did not know that. Thanks for the heads up. In live view on a tripod, I tend to switch to manual focus, and zoom in with digital zoom and focus peaking to confirm the exact spot I'm after. View returns to full screen once you half press the shutter button again and you're all good to go.
Posted by richandfleur on 19/11/2019 - 21:07
Little live view A/F tip
No I did not know that. Thanks for the heads up. In live view on a tripod, I tend to switch to manual focus, and zoom in with digital zoom and focus peaking to confirm the exact spot I'm after. View returns to full screen once you half press the shutter button again and you're all good to go. I...
Posted by cardiffgareth on 19/11/2019 - 22:59
Little live view A/F tip
No I did not know that. Thanks for the heads up. In live view on a tripod, I tend to switch to manual focus, and zoom in with digital zoom and focus peaking to confirm the exact spot I'm after. View returns to full screen once you half press the shutter button again and you're all good to go. I...
Posted by richandfleur on 20/11/2019 - 00:57
