GXR-M and CornerFix

S

scho

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Files from my wides on the GXR-M are looking similar to those from my old M8 with respect to corner performance. Here are a couple of sample images with the CV 21 f/4 Color-Skopar on the GXR-M. I've also noticed that there appears to be a bug in firmware 1.4 that prevents Lens Name from being written to the DNG file exif (Lens Name does get recorded in the jpeg exif).

White wall shot used for CF profile for the 21 Skopar:
original.jpg


Before CornerFix 21 Skopar at f/5.6:
original.jpg


After applying CornerFix profile:
original.jpg
 
Just another before/after comparison with CornerFix, this time using a 25mm f/4 p Skopar. Seems like many of the wide lenses, below 28mm will exhibit this corner/edge cyan vignetting on the GXR-M. I see hardly any with the same lenses on the NEX-5N.

Concerning the lack of DNG exif info for Lens Name. I sent Sandy at CornerFix a DNG file that was shot with the 21 Skopar on the GXR-M and his comments are below:

"The lens name is there. Sort of. It's in the Ricoh MakerNotes. (CV 21MM F/4 COLOR-SKOPAR) But unfortunately, unless you're running software that understands Ricoh MakerNotes, that won't help much!!!!

Why Ricoh chose not to put it in a EXIF tag I don't know."

Before CornerFix:
original.jpg


After CornerFix:
original.jpg
 
gDallasK said:
How would the camera know what lens is attached? There is no electronic connection between the A12-M and the lens.
Click to expand...

You can record and store lens info (name, focal length, aperture) in the camera. There can be data for up to six lenses stored in-camera and more can be saved on a memory card. Three lenses can be assigned at any given time to the settings switch (MY1, MY2, MY3) on top of the camera. When you change lenses just switch to the appropriate setting position. All images taken will then have lens data for that switch setting recorded in exif. Current problem is that if you are shooting raw, Lens Name does not get put into an exif tag. It is in the jpeg exif and maker notes. If you want this info in the raw file, then it can be pushed in later with exifTool. The issue has been reported to Ricoh and there may be a fix in the next firmware upgrade.
 
nex vs gxr

nex vs gxr

Scho ....

Since you have both, are there any usability issues that you have seen? ( I'm really thinking fixed vs tilt screen )

and

have you seen any real advantage to the AA vs no AA filter, in the real world?

Thanks for the answers

Dave
 
djonesii said:
Scho ....

Since you have both, are there any usability issues that you have seen? ( I'm really thinking fixed vs tilt screen )

and

have you seen any real advantage to the AA vs no AA filter, in the real world?

Thanks for the answers

Dave
Click to expand...

Dave

If you are using MF lenses outside in bright light then an EVF is really essential for both the GXR and NEX. The OLED finder for the NEX is much better than the VF-2 for the GXR. Focus peaking is good with both cameras, but probably somewhat better with the NEX. The tiltable LCD on the NEX is definitely a plus if you are shooting on a tripod or when you need extreme angles for a shot. I rarely use the LCD on either camera outdoors unless it is overcast. Handling is a bit more comfortable with the GXR and I don't like the very small size of the NEX-5N.

I can usually see more fine detail in GXR-M images, but I don't know yet if this really translates into better prints. More MP might be a better option for large prints, particularly with the NEX7, if they use a relatively weak AA filter. Here is a full size version of an image I posted earlier in another thread that may demonstrate the fine detail when viewed at original size and also in this image there is some moire visible that is an occasional negative aspect of and AA-less sensor.
http://www.pbase.com/scho/image/138577463

Carl
 
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