i think this profile was user created. not sure if officially supported by adobe
Will check if I could find one for LR if I could hen I may consider this lens hehehe
good news. i found the lens correction profile and added it to the list of lenses in adobe camera raw folder and my CS6 now corrects my samyang perfectly. Lines are pretty much now nice and straight a click away in CS6.
source of the correction profile. I couldn't get my CS6 to recognise the additional samyang profile though. so what i did was to copy the file in and replaced the profile of the canon 14mm f2.8L.
samyang 14 2.8 is quite nice on the a7r. i adapted a ef mount onto the a7r. Some test shots below from the lens that just arrived from amazon.
distortion is definitely there, but shld be correctable with the right lens profile, plus a lens sharp edge to edge at F2.8 is hard to find at this price point. simply stunning at F8
Sample #3 taken yesterday for the sensor reflection problem.
This time its with a Voigtlander 12/5.6, so its certainly not isolated to one-two lenses.
DSC0473620140223ILCE-7-sensor_refection by jenkwang, on Flickr
However, its fixable in post with about 5 mins of cloning.
Doable, but certainly an irritation and dependant on being able to find similar textured/lighting/items to clone into.
DSC0473620140223ILCE-7-1 by jenkwang, on Flickr
I found an alternative version (seems to be merge of 2 profiles and apparently also corrects vignetting). Have you tried this one? I dun have the lens to try.
http://www.svenstork.com/2013/10/02/rokinon-14mm-lightroom-lens-profile/
It's hard to tell because it's just 1600px, but the sides don't look especially sharp compared to the center so I'm not sure if it's sharp edge to edge. If you post a link to a full size sample, can see for sure. With the distortion, I'm pretty sure that it can't be. Seems quite a neat lens for the hobbyist , especially the central sharpness, but the distortion would be quite difficult for serious architectural use. The combination of pincushion and barrel distortion is unusual and could be caused by the adapter.
good news. i found the lens correction profile and added it to the list of lenses in adobe camera raw folder and my CS6 now corrects my samyang perfectly. Lines are pretty much now nice and straight a click away in CS6.
source of the correction profile. I couldn't get my CS6 to recognise the additional samyang profile though. so what i did was to copy the file in and replaced the profile of the canon 14mm f2.8L.
http://ip-networx.de/index.php?option=com_content&task=view&id=49&Itemid=91
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i have a question..
in theory, which will be better ?
to shoot an object at 300mm focal length in full frame mode and crop to desired size or shoot at 450mm focal length in apsc mode (10megapixel)without cropping.
which option above will give better image quality?
Depends on the glass, and which sensors (FF and APS-C) are you comparing...
Anyone have the A7R + Tamron 24-70 f2.8 compared with the expensive Sony 24-70 F4/F2.8 How well does it pair?
I found an alternative version (seems to be merge of 2 profiles and apparently also corrects vignetting). Have you tried this one? I dun have the lens to try. http://www.svenstork.com/2013/10/02/rokinon-14mm-lightroom-lens-profile/
Sample #3 taken yesterday for the sensor reflection problem. This time its with a Voigtlander 12/5.6, so its certainly not isolated to one-two lenses. http://www.flickr.com/photos/29329237@N07/12733472424/ DSC0473620140223ILCE-7-sensor_refection by jenkwang, on Flickr However, its fixable in post with about 5 mins of cloning. Doable, but certainly an irritation and dependant on being able to find similar textured/lighting/items to clone into. http://www.flickr.com/photos/29329237@N07/12732973825/ DSC0473620140223ILCE-7-1 by jenkwang, on Flickr
i have a question..
in theory, which will be better ?
to shoot an object at 300mm focal length in full frame mode and crop to desired size or shoot at 450mm focal length in apsc mode (10megapixel)without cropping.
which option above will give better image quality?
i have a question..
in theory, which will be better ?
to shoot an object at 300mm focal length in full frame mode and crop to desired size or shoot at 450mm focal length in apsc mode (10megapixel)without cropping.
which option above will give better image quality?
It's the same. When you shoot 300mm in full-frame, then crop the result into 10mpix (at the center), you'll get the same IQ as if you set the A7 into APS-C mode and shoot with 300mm x1.5. Because you're using the same center area of the sensor to capture in APS-C size instead of the whole sensor (full-frame).
The only difference I can think of is that you can frame the picture properly during the shot if you set the camera to APS-C mode, if your intention is to make use the full 450mm.
But shooting at full-frame mode give you more flexibility during cropping, e.g. you can crop a 12mpix or 15mpix size, slightly to the left/right/etc.
If your lens is sharp across the frame, it is better to shoot in FF, then crop later.
Wow this is bad widest lens I have is 19 and 21 mm so far not seen this issue on A7r is this isolated to RF lenses or even SLEEP and FE lens?