Search results for 'back focus' - page 1168
Samyang 85 on a hike
This lens does seem good value for money even here in UK, on a price/performance basis. In a way it is surprising it hasn't sold more widely given that it is close to the focal length of one of the best selling 35mm film lenses by focal length...the 135mm. 85 x 1.5 on a Pentax APS-C comes out at ab...
Posted by 1stEverPentax on 04/12/2015 - 11:44
Samyang 85 on a hike
Samyang lenses can be excellent, but manual focus only. Pentax do make an 85mm lens, in a way. The equivalent for APS-C format is the 55mm f/1.4. They also make a 70-200mm f/2.8, which is the 50-135mm f/2.8. I've noticed quite a few photographers think in 35mm format terms when asking for foca...
Posted by LawrenceKH on 04/12/2015 - 14:31
Samyang 85 on a hike
Interesting set of images. Some look really sharp. One or two look sharp in places, but not so detailed elsewhere in the image, but I wonder if that is down to jpeg compression (the one I was thinking of was the one you mentioned about focussing on the mountain early in the set - about no 6) Seemed ...
Posted by LawrenceKH on 04/12/2015 - 14:35
Samyang 85 on a hike
LawrenceKH, sounds like your camera is not configured for what you need. I think the LCD screens can be set to remain on for certain periods of time (eg 10sec, 30 sec etc ... ?) Your aperture and 'shutter speed' values will be displayed in the viewfinder also. I would really strongly advise you ...
Posted by LawrenceKH on 04/12/2015 - 17:56
Samyang 85 on a hike
I'd try this .... Make sure the lens aperture ring is set firmly to the 'A' position. Now set Av mode on the camera mode dial. Your e-dial which is set to control aperture will now directly control aperture, which will be indicated in the viewfinder and LCD. A half press on the shutter will activate...
Posted by McGregNi on 04/12/2015 - 18:17
Samyang 85 on a hike
I'd try this .... Make sure the lens aperture ring is set firmly to the 'A' position. Now set Av mode on the camera mode dial. Your e-dial which is set to control aperture will now directly control aperture, which will be indicated in the viewfinder and LCD. A half press on the shutter will activate...
Posted by LawrenceKH on 04/12/2015 - 18:37
Samyang 85 on a hike
https://lawrencehelm.smugmug.com/RiverPhotography/Dec-2015/ Before going on a hike today I checked the K3 manual and found out how to increase the illumination of the OFV metering information from 10 seconds to 30. Later at the hiking area I turned on the camera and it, in effect, said "we notic...
Posted by LawrenceKH on 04/12/2015 - 23:39
Pentax DA 560 or SIGMA 500 APO - which one
A DA*300mm f/4 + the Pentax-F 1.7x Adapter will give you 510mm f/6.3. It indicates the correct aperture to the camera. Image is bigger than the 1.4x TC and just as sharp. The Sigma 150-500mm should be sharp :shock: What's important with these long lenses is holding them steady and getting the f...
Posted by Algernon on 06/12/2015 - 09:04
Pentax DA 560 or SIGMA 500 APO - which one
Ok, just went out - light not great, figured "auto" knows best - this is typical shot with this lens - tripod but did not go as far as mu and rt - this has had no PP, no cropping, its high res as in 9MB! - nothing is in focus/sharp - the subject i.e. the bird (focused on this), the branch in the f...
Posted by Taynuiltpixels on 06/12/2015 - 13:20
Pentax DA 560 or SIGMA 500 APO - which one
The bird shot looks to be heavily front focusing on the nearest part of the branch. Try taking a photo of some roof tiles (full roof) focusing on the middle tiles and see if it's the tiles in front that are in focus. --
Posted by Algernon on 06/12/2015 - 14:27
Pentax DA 560 or SIGMA 500 APO - which one
Too dark now for the tiles but that is a good idea Algi - I'll give it a go. Chris - I left stabilisation on (I always do). Does leaving it on effect sharpness and if so how. Re the higher iso - I tried that before to get the shutter speed up and just makes things worse a horribly noisy but I'll gi...
Posted by Taynuiltpixels on 06/12/2015 - 15:58
Pentax DA 560 or SIGMA 500 APO - which one
my version of the lens does not have SR or IS - how does turning the IS off in the camera help with focus? :roll:
Posted by Taynuiltpixels on 06/12/2015 - 16:41
Pentax DA 560 or SIGMA 500 APO - which one
The sensor kind of generates its own shake because it can't find any that its expecting to find for it to counter. IMHO, if nothing on the bird shot is in focus, it sort of suggests camera shake of some sort or perhaps a lens requiring a service. If you were closer I'd suggest we meet and you tr...
Posted by Chrism8 on 06/12/2015 - 17:16
Pentax DA 560 or SIGMA 500 APO - which one
When having trouble focusing via the optical viewfinder, I switch to LV. This also kicks in mirror lock-up (obviously). I use with focus peaking and centre magnification. With a long reach lens, you may find the standard 2 second delay from pressing the shutter is not enough, depending on a range...
Posted by ronniemac on 07/12/2015 - 21:01
Last hike before Samyang 85 will be returned
https://lawrencehelm.smugmug.com/RiverPhotography/Dec-2015/ I didn't mention it in the previous hike thread but there was a smear of something on the inside of the aft lens. One reads sellers of used lenses to say that though there is debris, dust, even fungus inside their lens it doesn't show u...
Posted by LawrenceKH on 07/12/2015 - 00:09
I just got a "plastic fantastic" 100mm Cosina macro
Made by Cosina, these carry a multitude of brand names (this IS a Cosina). They have a very high reputation, both as macro and everyday 100mm lenses. They are indeed plastic - hence the moniker. On its own it goes down to 1:2 and with the purpose designed 'matched macro adapter' lens on the front, 1...
Posted by davidwozhere on 14/12/2015 - 00:22
I just got a "plastic fantastic" 100mm Cosina macro
I've got the Pentax version which I bought new in the 90's and added the vivitar version for my Canon kit as I liked the Pentax so much. Fine tuning manual focus is very difficult, but in macro mode I use the tried and tested rocking back/forward rather than manual focus, so that works fine. Optical...
Posted by walt on 14/12/2015 - 21:02
I just got a "plastic fantastic" 100mm Cosina macro
Yeah I have the manual focus Cosina version and its great. Not at all bad at infinity either (with the front macro adaptor removed, obviously). I occasionally have a "100mm day" and just use that as my sole lens. Always happy with the images. Paul
Posted by PaulEvans on 16/12/2015 - 14:16
Samyang 35mm and the Pentax-M 200 mm test drives
https://lawrencehelm.smugmug.com/RiverPhotography/Dec-2015/ The last 28 shots in the above gallery were taken today -- "test drives" of the Samyang 35mm and the Pentax-M 200 mm. The Samyang 35mm impresses me enormously. A couple of shots, especially the one of Ben standing hunched-over in the ...
Posted by LawrenceKH on 17/12/2015 - 12:45
Can't identify this mount on a Jupiter 4/135mm lens
Most Russian 135's used a T2 mount. See if there are 3 small screws 120deg apart that will release the Contax mount. If so just but a replacement T2 'K' mount off ebay for about £5 -- I "think" the Russian A mount lenses (similar to T mount) are only those where the model number ends in A. The...
Posted by andrewk on 19/12/2015 - 12:28
