Roland Karlsson

Roland Karlsson

Lives in Sweden Stockholm, Sweden
Works as a Programmer
Joined on Feb 23, 2002
About me:

Collector of K-mount and M42 stuff. Main camera K-5. Also interested in camera technology, e.g. Foveon. Also interested in computer based image analysis and transforms.

Recent activity

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Snapshot of threads updated recently in which you have recently participated.

Subject Forum Last post
Corrupted images Sigma Camera Talk 1 hour ago
Getting to know my dp2 quattro Sigma Camera Talk 1 hour ago
I've figured out the difference between Merrill and Quattro Sigma Camera Talk 1 hour ago
Speculation: Quattro full-frame Sigma Camera Talk 3 hours ago
Test my knowledge of sensors. Leaving all emotions aside. Photographic Science and Technology 4 hours ago
Q Looses the 3-D of the M? Sigma Camera Talk 6 hours ago
Urban angst before a storm Sigma Camera Talk 8 hours ago
should the Quattro really be considered just an updated SD10? Sigma Camera Talk 23 hours ago
First day with my new DP3 merrill, a pano of Arequipa Sigma Camera Talk 1 day ago
binned RAW photos for X3F tools Sigma Camera Talk 1 day ago
Has anyone ever seen... Sigma Camera Talk 1 day ago
thinking of moving to a K3...anything I need to be aware of ? Pentax SLR Talk 2 days ago
Microcontrast. It is a function of the lens, sensor or both. Sigma Camera Talk 2 days ago
Old lenses on dp2x Sigma Camera Talk 2 days ago
3D Pop : Q vs M Sigma Camera Talk 3 days ago
Will the Quattro Embarrass Sigma into dropping their camera line? Sigma Camera Talk 4 days ago
DP2 Quattro ISO 400 Sigma Camera Talk 5 days ago
The ultimate color resolution comparison: DP1 Merrill, DP2 quattro, Sony A7r Sigma Camera Talk 5 days ago
X3F Tools and Quattro - status report Sigma Camera Talk 5 days ago
Green Channel sharpening with the Quattro Sigma Camera Talk 1 week ago
Trade-offs of Q imager Sigma Camera Talk 1 week ago
84.5% prefer dp2 quattro over DP2M Sigma Camera Talk 1 week ago
Merrill vs Quattro color saturation Sigma Camera Talk 1 week ago
Q is the normalization of Foveon (?) Sigma Camera Talk 1 week ago
Q Monochrome: significant high ISO disadvantage compared to M Sigma Camera Talk 1 week ago
DP2Q and DP2M comparsion by Quentin Bargate Sigma Camera Talk 1 week ago
After 1000 Quattro posts and images the verdict is in Sigma Camera Talk 1 week ago
Idea for Sigma - part 2.... Sigma Camera Talk 1 week ago
lets talk about this guys Quattro images........ Sigma Camera Talk 1 week ago
Improved Grip Without the Bulk Pentax SLR Talk 1 week ago
[dp2Q] Abandoned Sigma Camera Talk 1 week ago
Brenizer method attempt with the DP2M Sigma Camera Talk 1 week ago
Not scientific, very casual Quattro vs. Merrill test Sigma Camera Talk 1 week ago
DP3m image quality Sigma Camera Talk 1 week ago
FYI: SPP color bugs Sigma Camera Talk 1 week ago
CCD vs. CMOS Pentax SLR Talk 1 week ago
How many People Shoot Raw? Pentax SLR Talk 1 week ago
quattro, what about dynamic range and highlight recovery? Sigma Camera Talk 1 week ago
The Quattro Sensor and the YCgCr Color Space - are they related? Photographic Science and Technology 1 week ago
A B&W Shot with the DP2Q Sigma Camera Talk 2 weeks ago
Dpreview will start making comparison photos at fixed exposure Photographic Science and Technology 2 weeks ago
New Sigma official DP2q photo gallery Sigma Camera Talk 2 weeks ago
New Images - Quattro vs Merrill Sigma Camera Talk 2 weeks ago
An interesting observation by Lens Rentals regarding the filter stack Photographic Science and Technology 2 weeks ago
The negative sign and Quattro Sigma Camera Talk 2 weeks ago
Quattro and high contrast scene Sigma Camera Talk 2 weeks ago
The most irrelevant K-3 complaint so far Pentax SLR Talk 2 weeks ago
The "Beer Garden" phenomenon Sigma Camera Talk 2 weeks ago
DP1M lens - is it really not as good as DP2M Sigma Camera Talk 2 weeks ago
still life Sigma Camera Talk 3 weeks ago