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 Replies: 14 / Views: 2,115 |
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Pillar of the Community
United States
3180 Posts |
Sorry for the large files but I wanted to be sure to upload these for your review and thoughts. These were taken with the Pentax K1, shot at f8 at 1/125th of a second at ISO 100 using strobes. The camera is amazing and it will take some time to figure it all out but I don't think these are too bad for a first go round with it. Thanks for looking.   Edited by srs77
05/15/2016 11:54 am
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Pillar of the Community
Canada
2784 Posts |
wow amazing the detail. what lens was you using. outstanding photos
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Pillar of the Community
 United States
3180 Posts |
Hi Rocky, it's a Tamron 90mm 1:1 Macro. Great lens and available for many different mounts.
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Pillar of the Community
Canada
2784 Posts |
srs77 you have a great lens and camera combination there. that is some coin great photos. very well done
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New Member
Greece
45 Posts |
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Pillar of the Community
 United States
4038 Posts |
Nice pics srs77! I see the final size is 2300x2300. The original image is 7360x4912, so looks like you're doing a little cropping and a little downsizing. Did you use the pixel shift mode for this pic? I'd love to see some 100% crops to see what it's capable of.
Do you know if it has EFSC/EFCS shutter function?
How much in-camera sharpening is happening on this pic?
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Pillar of the Community
United States
1298 Posts |
srs77, what are strobes? could you share some pics of your setup? Thanks, Hamm.
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Pillar of the Community
United States
3180 Posts |
Ray, the pics have no processing other than just cropping out the background. The image is as it was shot in terms of size. The original pic was indeed the size you mentioned but I am able to do a circular crop and the image was not reduced in size, hence the warning at the beginning :)
As far as EFSC is concerned I have a ton to learn yet and will look into that. The pixel shift resolution is next in line but being I use strobes that will be a bigger challenge as I have to set up continuous lighting to take advantage of that. That's not a problem, just that my studio isn't set up for that right now. I'll re-address the studio and take another set of pics with that to compare.
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Pillar of the Community
United States
4809 Posts |
Great shots! Have fun refining your process. I wish my pictures were half as good!
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Pillar of the Community
2087 Posts |
Quote:
Ray, the pics have no processing other than just cropping out the background. The image is as it was shot in terms of size. The original pic was indeed the size you mentioned but I am able to do a circular crop and the image was not reduced in size, hence the warning at the beginning :) I understand from this you were using a low magnification. Is that correct? I calculate you were using around .46X with the coins image covering less than half the hight of the sensor. ( correct?) Usually with a coin the size of a large cent , I have to use a magnification of a little less than .88X (24mm/27mm) to use the whole sensors height. At that size I usually have just enough Depth of field for lower relief coins. I haven't experienced photographing a large cent but I anticipate that at .88 magnification the DOF is getting to the point where stacking is becoming the preferable option. With .46X, (assuming I have understood what you have done correctly) you are loosing the advantage of a FF sensor although you are getting adequate DOF. I would expect that ans APSc 18mp camera would produce very similar results. The DOF is one of the reasons I quite often set my full frame camera to APSc capture. IMHO Where the full frame sensor has its advantage is with imaging larger sized coins such as Morgan dollars) All that said they are very good shots Edited by austrokiwi
05/16/2016 02:55 am
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Pillar of the Community
United States
9395 Posts |
Fantastic detail in those shots -- it looks like the camera sensor + lens combo works great on coins.
Is there some special process needed to upload 2300 x 2300 files to CCF (not that my shots are really sharp enough for 2300 x 2300)?
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Pillar of the Community
United States
3180 Posts |
pepactonius, I host my own photos so I can't answer the question you've asked. The moderators here will be better to inform you of any size restrictions.
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Pillar of the Community
United States
3180 Posts |
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srs77, what are strobes? could you share some pics of your setup? Thanks, Hamm. Sorry Hamm, I didn't see your question. Strobes are flash photography as opposed to constant lighting photography. Most folks here use lights like Jansjos for their coin photography. I have a studio (photography a little more than a hobby) and I use my studio setup which has Elinchrome D-Lite 4s as my lighting. These are strobes that are run by a trigger that sits atop my camera. When the camera fires the trigger sends a signal to the lights and the lights fire as well. I can adjust my manual settings accordingly on my camera to capture what I need for the shot. Here is a picture of the lights I use:  |
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Pillar of the Community
United States
1298 Posts |
Thanks srs77. I remember now.
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Pillar of the Community
2087 Posts |
I went off and read a couple of reviews on the camera. I note it doesn't have an anti-aliasing filter but that it simulates one by vibrating he sensor minutely. Can you turn that vibration Off?. I note looking at the fields of the penny they do seem to be slightly out of focus( that could be my monitor though) If you can turn the AA effect on an off it would be brilliant. With my FF camera every so often Moire gets in the way of good shots. Being able to simulate an AA filter from time to time would be very useful. Edit:I got my answer yes the AA simulation can be turned off and on. That is a nice feature! I also read this at DP review Quote:
Pixel Shift Resolution mode that increases color resolution by shooting four consecutive images with the sensor moved by one pixel - effectively canceling the Bayer color filter array and lowering noise by image averaging. A few other reviewers noted the same thing. Is my understanding(follows) correct? That the pixel shift in the Olympus camera has the effect of simulating a sensor with a great many more pixels. The pixel shift in this new Pentax is aimed at increasing color resolution( which is cool). Edited by austrokiwi
05/19/2016 01:01 am
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Replies: 14 / Views: 2,115 |
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Posted 05/15/2016 12:08 pm
