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Forum: Pentax DSLR Discussion
02-22-2016, 04:13 AM
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Forum: Pentax DSLR Discussion
12-29-2014, 04:01 AM
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bleuwater, the mis-focusing in your pictures is extreme, judging from the EXIFs your focusing point was on AUTO if I am not mistaken. My guess is that the camera just focused on the background like in the first pic. I never let my K-5 (or any other camera of that generation or older) choose the focusing point, it is not good at guessing where I want it to focus. Try to set your focus point always to the center (like I do) or use manual selection of the focus point and see if you still get any mis-focused shots.
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Forum: Pentax DSLR Discussion
12-28-2014, 03:13 AM
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To answer your question: there have been many reports in these forums (and elsewhere) of K-5 AF issues. You can use search and read. I do not think there is general agreement if it's user error or real issues of K-5. Personally I am convinced that although quite often the problems can be attributed to user error, there are real issues with K-5 AF.
Possible solutions: use AF fine-tuning (available in K-5 menu), send your lens/camera for adjustment, use manual focusing, use Live view mode, be extra careful in tough lighting conditions and when focusing on small objects. All of this helps but may not be enough to eliminate misfocusing 100%.
Issues that have been reported:
- software bug when AF fine adjustment is not active even though it is set in the menu https://www.pentaxforums.com/forums/115-pentax-k-5/230976-af-fine-adjustment-...ml#post2445845
- front-focusing in low tungsten light when focusing on slightly reddish subjects (like skin) - see analysis by Falk Lumo.
- inconsistent behaviour with some lenses (front or back- focusing or even both at different focal lengths)
- it has been speculated that the central focusing area is too big on K-5 which makes it hrs to focus on small objects (like eyes) surrounded by other objects
Once in a while I grow really frustrated with K-5 mis-focusing. All the workarounds and adjustments do help, but it is quite annoying the amount of effort you have to put into it. I have found that when I am shooting regularly and a lot, focusing improves because you get used to being careful and knowing limitations and workarounds, when I shoot less, I start to forget and the mis-focusing become bigger an issue
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Forum: Pentax K-5 & K-5 II
12-21-2013, 06:08 PM
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Forum: Pentax Camera and Field Accessories
09-26-2013, 02:08 AM
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My guess is you were using the filter on a wide lens. then it is an unavoidable effect
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Forum: Pentax K-5 & K-5 II
09-15-2013, 02:16 AM
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Just tested if the issue is still there with the new firmware 1.15 for K-5. It is still there. :(
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Forum: Lens Clubs
07-30-2013, 09:42 AM
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Derek, thanks a lot for your time. I was getting something similar with RawTherapee, though I wasn´t satisfied.
Why do you recommend to use DNG over PEF?
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Forum: Lens Clubs
07-29-2013, 05:45 PM
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Thanks for your response. Postprocessing is what I struggle with (well it is my secondary problem after being a bad photographer). I am simply overwhelmed by the postprocessing options (even though I do understand the technical side of it). I tried to play with free software (RawTherapee, GIMP), though I rarely go beyond adjusting levels. Typically I can not do better than straight-out-of-camera JPEG. (The above picture I have posted is an example). Interestingly enough I can appreciate when someone else does a good job (to my taste) at PP, but I can not reproduce it simply following my taste.
I would appreciate if you could be so kind and play with the RAW file from my image and show me what you can do with it (if you think it is worth bothering at all). I have uploaded the PEF file here: Filebin - Tag p0k0cmgzzn |
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Forum: Lens Clubs
07-29-2013, 02:54 AM
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I have similar problems with my Jupiter-9 85/2 and maybe with other manual lenses too. The only reliable focusing for me is using Live View.
What I seem to observe is that the focus confirmation is way off. Unlike in your case the focus confirmation does not match when the image seem to be in focus on the focusing screen. Actually I would suggest to look again at this. I would expect that the focusing screen should give reliable focusing if the focusing screen is installed and shimmed correctly.
I do not know if there is any agreement on the internet why the focus confirmation may be off, though I can think of a few reasons, so I have never expected it to work accurately with old lenses.
As for infinity being shifted it does seem too much, I do not own the J-37A, so I can't help you
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Forum: Lens Clubs
07-29-2013, 01:40 AM
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K-5 Tamron 17-50 f2.8
critique is welcome!
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Forum: Lens Clubs
07-29-2013, 01:23 AM
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Beautiful pictures! I was wondering how much postprocessing you did on these. Could you please describe your workflow?
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Forum: Pentax K-5 & K-5 II
07-26-2013, 11:20 AM
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Long promised (by me) the response I have received from Pentax:
"Dear Mr. XXX,
Thank you for contacting PENTAX.
Also, thank you for reporting this issue with the AF Fine Adjustment on the K-5. I have forwarded your email to our senior technical support specialists in the corporate office for further investigation.
If you are in need of further assistance, please respond to this email or call our technical support center at 800-877-0155.
Sincerely,
Randall S.
PENTAX RICOH IMAGING AMERICAS CORPORATION /
PHONE: 800.234.0276 /800.877.0155 / BE INTERESTING. PENTAX"
I am forwarding further details to them. I intend to push as much as I can on them to have it fixed.
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Forum: Welcomes and Introductions
07-26-2013, 10:42 AM
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Lucky you! Welcome to the forum
Jorgario, strictly speaking the focal length of the lens does not change. You can speak of "effective focal length" instead which tells you the focal length of a lens that will have the same angle of view on a 35mm camera as the lens in question on the cropped sensor. The APS-C sensors that Pentax uses are 1.5 smaller than 35mm film (in linear dimensions). This is called "crop factor". Effective focal length = Crop factor x the actual focal length of the lens.
So a 28mm lens mounted on your K-30 will have the same angle of view as a 28x1.5 = 42mm lens mounted on a 35mm camera. I.e. your 28mm lens can be considered to be a "normal" lens on the K-30
Same applies to any DA lens. The focal length given for all DA lenses is their actual focal length, not their effective focal length. I.e. the DA40 would have the same focal length as an FA40. For example the DA 15 Limited has the same angle of view as 15x1.5 = 22.5mm lens mounted on a 35mm camera
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Forum: Digital Processing, Software, and Printing
07-26-2013, 10:13 AM
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I am using RawTherapee because
- it is free and opensource
- it is cross platform
- it is updated regularly
- it has all the features I can think of unlike most other RAW developer software including easy to use Noise reduction
- it is relatively intuitive and there is a good (and up-to-date) pdf manual
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Forum: Troubleshooting and Beginner Help
07-26-2013, 01:52 AM
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Traditionally the way to use an SLR camera is to compose using the viewfinder. For a while SLRs did not have an option to compose through LCD. LCD was only used to display the settings and menus before the shot and to review the end-result.
Nowadays most dSLR do offer the so-called Live View which allows to shoot (compose) using the rear LCD. However they work completely differently in this mode, for instance the focusing is different (Contrast detection in LV, and Phase Detection in traditional mode). One of the advantages (or lets rather say features) of SLRs was using the Phase Detection AF (which used to be much faster and maybe still is), so many SLR users still compose and shoot using the viewfinder, rather than the Live View (rear LCD screen).
Pentax K10D did not have Live View, I think the first Pentax to feature live view was the K20D.
The first implementations of live view were not very useable, now they are. Though if you only/mostly intend to use the Live View (rear LCD) I would recommend getting a MILC (mirrorless) or a P&S.
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Forum: Pentax K-30 & K-50
07-26-2013, 01:30 AM
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Forum: Pentax K-30 & K-50
07-26-2013, 01:03 AM
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No. HDR takes several shots instantly (with a single shutter press), so you can not recompose. Really think of Multi Exposure mode as means of merging several different scenes, not merging different exposures of the same scene
Also HDR is JPEG only, while Multi Exposure can merge and gives final result as a RAW file (or JPEG, or both)
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Forum: Pentax News and Rumors
07-26-2013, 12:30 AM
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Thanks for the info.
It is quite obvious they will announce something by the end of September as they (and all other manufacturers) always do. So your info is quite in line with that. I would expect either another advanced APS-C dSLR (since the lower-end ones have been released recently) or FF or the upgrade of the K-01. And those will ship by Christmas most probably. Most probably the APS-C dSLR, as imho there was not enough time for them to polish the FF yet.
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Forum: Pentax K-30 & K-50
07-26-2013, 12:19 AM
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Traditionally the idea of multi exposure is that you overlay 2 (or more) different images (different composition). In practice the difference between 2 and 3 does reflect that. Namely when you do bracketing you press the shutter once and you get 3 (or whatever number you select) pictures instantly (almost), so composition will be the same. In multi exposure mode you have to press the shutter button to take every picture and the result is being saved as a single merged image (and not several pictures and in bracketing).
So the differences between 2 and 3 are:
- you have to press the shutter button to take every shot in Multi Exposure mode, when bracketing you press the shutter button only once
- in multi exposure mode you can change composition between the shots *
- in Multi Exposure mode you can also refocus as you please between the shots of course unlike in all other modes
- when bracketing each image is being saved individually, so the end result is n pictures with different exposure, in Multi Exposure mode you have only 1 image at the end - which is the combined image from all the shots
(I have the K-5 and I have assumed the K-30 works in the same way)
* it means that in Multi Exposure mode you can take a landscape picture, then a picture of something else (for instance a picture of a paining). The result is saved as a single image with both shots blended together
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Forum: Pentax Price Watch
07-25-2013, 11:35 AM
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Note, the picture shows the non-WR version of the lens. Also the manufacturer part number is for the kit with a non-WR lens.
However the description (under package contents) claims this is the WR lens.
My bet is the kit is non-WR, though you will have a valid reason to complain about that since their description claims otherwise.
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Forum: Pentax SLR Lens Discussion
07-24-2013, 11:13 AM
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I took my J-9 for a spin today. And I can confirm what Steve is saying. I consistently get slightly better exposure in M-mode (using the approach described by Steve) than in A-mode. Both modes give me an underexposed image and this improves a bit as I close down. A few of my shots came out at the limit of K-5 ability (shutter speed 1/8000). If Boris had overexposure he must have reached that limit (even more probable if ISO was higher than 100)
small correction. you can use exposure compensation, but you have to re-meter (press the green button) again after you dial in the exposure compensation, otherwise it will have no effect. You can instead change the shutter speed directly of course.
Never happened to me.
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Forum: Welcomes and Introductions
07-23-2013, 01:31 PM
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Interesting. I live in high humidity location now too and I have started to worry about my lenses/cameras. So far nothing has happened (other than mold appearing on some of the older leather cases and straps). I will keep an eye on my Tamron 17-50.
Btw, I am also from Russia
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Forum: Welcomes and Introductions
07-23-2013, 02:16 AM
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welcome to the forum!
how did you break the Tamron 17-50?
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