Search results for 'back focus' - page 1136
Advice for a wildlife newbie
All of the advice is excellent and with the possible slight deviation of the 120-400 Sigma very consistent. I have followed exactly the same route as Alan (Blythman)but independently, not realising what he had been doing. It was borne from experience in the field. You can see that development here i...
Posted by dcweather on 13/06/2014 - 16:12
Advice for a wildlife newbie
I took my 50-500mm OS out today with the K-3 .. will post up some pics if you want to see how it performed. I have all 5 variants that weinelm listed (plus a few more) :roll: and personally if it had to be just one lens it would be the 50-500mm OS. The 2 main things it has over the 150-500mm is ...
Posted by Mike-P on 14/06/2014 - 16:56
Focus tuning.
After getting a k5iis and a da*60-250 i went off yesterday to try them out. now my panning techniques are not the best but even on static shots i was unimpressed with the sharpness or lack of it. so this morning decided to fine tune my lenses using this http://photographylife.com/how-to-quickly-...
Posted by derek897 on 15/06/2014 - 12:35
Focus tuning.
Of course the one you found OK was a Pentax, being made by them in the same factories. However, some people find a need to adjust lots of lenses. Some, like myself, have never found such a need. When I do, I'll run the appropriate tests and make adjustments. With a zoom it will be a compromise as...
Posted by johnriley on 15/06/2014 - 12:43
Focus tuning.
Here are 3 after focus tuning and one without. Recropped and exposure adjusted, no sharpening. The last one was pre tuning The difference is staggering.
Posted by derek897 on 15/06/2014 - 17:45
Focus tuning.
Sorry all were shot handheld.
Posted by derek897 on 15/06/2014 - 17:46
Focus tuning.
I particularly like the third shot, a really good composition. If your pictures are now sharp, and they seem to be, then the job is done.
Posted by johnriley on 15/06/2014 - 17:47
Focus tuning.
Thanks John. Derek
Posted by derek897 on 15/06/2014 - 17:52
Zoom and Macro?
As far as I know there is no such thing as a true 1:1 zoom macro lens, they are (as you rightly presumed) just able to focus a little closer than most zooms. If I am out and about and not carrying my macro lens then I usually take a Raynox DCR-250 which is a small add on element that attaches to the...
Posted by Mike-P on 15/06/2014 - 21:00
Ephotozine review of the 60-250mm
My initial DA* 60-250mm was slightly decentered so I sent it back. My current copy is a superb performer even wide open. On the K-3 it makes for a formidable setup. I did a head-to-head test against a D800 + 80-400mm and the Pentax K-3 + DA* 60-250mm provided nearly identical IQ 20"x30" comparison p...
Posted by MJSfoto1956 on 05/09/2014 - 14:51
Ephotozine review of the 60-250mm
Nice comparison shots, puts the size difference into perspective, I'd be willing to give the lens another go, it's borderline weight wise for me and I feel the copy I had could have been sub par. It did not match my experience with the three 50-135 and two 300 mm Lenses (Hopefully soon to be three t...
Posted by jules on 05/09/2014 - 15:30
Ephotozine review of the 60-250mm
We've strayed a bit from the 60-250mm we started with, but the message is right - the grass isn't greener on any side of the equation. I've been very lucky with camera reliability in general. I've used a lot of cameras and a lot of Pentax cameras as well, and have only had a couple of body proble...
Posted by jules on 07/09/2014 - 14:27
Ephotozine review of the 60-250mm
there are a few zoom lenses out there that are nonpareil for the particular range they cover. The Nikkor 14-24mm is one. The Sigma 18-35mm is another. And to that list I would add the DA* 60-250mm. It really is an extraordinary lens for this range (90-380mm equivalent). My only advice is that once y...
Posted by MJSfoto1956 on 12/09/2014 - 20:53
Ephotozine review of the 60-250mm
Hi. Last week I send my new 60-250mm back to Pentax! It was sharp enough, but I had to set the camera finefocus on +10 and then there also was a little problem with the zoom, hard to turn at 135mm, like a thight point. It was fine in the ends. So, now I am waiting to get i back again and at the...
Posted by erikro on 16/10/2014 - 20:25
Ephotozine review of the 60-250mm
Hi. Last week I send my new 60-250mm back to Pentax! It was sharp enough, but I had to set the camera finefocus on +10 and then there also was a little problem with the zoom, hard to turn at 135mm, like a thight point. It was fine in the ends. So, now I am waiting to get i back again and at the...
Posted by jules on 17/10/2014 - 10:49
Tair 3a 300mm f/4.5 soviet rocket launcher shoots bus stops
I picked up a Tair 3A 300mm f/4.5 M42 lens a month or so back, based largely upon its reputation and the previous owners assurances about its condition. The 3A is the more normal looking and focussing version of this lens, not the Photosniper variant. It has a built-in tripod mount with both 1/4 a...
Posted by andrewk on 20/06/2014 - 14:23
Tair 3a 300mm f/4.5 soviet rocket launcher shoots bus stops
Over a year on, I happened to be pointing my Pentax DA 55-300mm over the fence after setting the micro focus adjustment. The is a 100% crop using standard phase detect focussing at 300mm, f/11. Yes, they have changed the bus stop. It's interesting to compare the result with that for the T...
Posted by andrewk on 11/11/2015 - 23:28
Tair 3a 300mm f/4.5 soviet rocket launcher shoots bus stops
The A 400mm f5.6 is a very good lens, and a different optical construction to the M and K series, giving better results - it also has the advantage of usability with the superb A series -L teleconverters (1.4x and 2.0x). You're unlikely to get a very high keeper rate, but with the right settings (a...
Posted by LennyBloke on 29/11/2018 - 15:53
Tair 3a 300mm f/4.5 soviet rocket launcher shoots bus stops
If you look at the 100% crop of the coke can, the letters in the central area look to have a white halo around them. If you get yourself a loupe and have a close look at the coke can, it also has that halo. In the area of critical focus, the crop is simple displaying what is there. I have read ...
Posted by andrewk on 29/11/2018 - 18:34
Tair 3a 300mm f/4.5 soviet rocket launcher shoots bus stops
Are these 100% crops? ...... I would have expected sharper. It's very difficult to MF focus long lenses that aren't on a tripod. Zoomed in rear screen is about the best for focussing. I've not tried it but switching the camera over to JPG MONO should give a clearer focus peaking image. Switch bac...
Posted by Algernon on 12/02/2019 - 08:12
