xpatUSA

xpatUSA

Lives in United States Bellville, TX, United States
Works as a Retired Consulting Engineer
Has a website at tcktek.blogspot.com
Joined on Dec 15, 2011
About me:

Mostly interested in Foveon technology.

Recent activity

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

Subject Forum Last post
No more colour blotching Sigma Camera Talk 23 min ago
Sensor temperature question Photographic Science and Technology 1 hour ago
Quattro X3F raw data - curiouser and curiouser Photographic Science and Technology 1 hour ago
blown highlights or badly processed or both? Sigma Camera Talk 8 hours ago
Why is Sigma and Foveon still relevant for the serious amateur? Sigma Camera Talk 10 hours ago
FT: My m4/3 Panny GH1 + 3 lenses + accs for Sigma SD1 Merrill! For Sale and Wanted 10 hours ago
Morning Rainbow Sigma Camera Talk 11 hours ago
1.5MP Foveon Sensor Sigma Camera Talk 16 hours ago
Quattro RAW File Size - why so big? Sigma Camera Talk 1 day ago
How does "total light" change SNR? Photographic Science and Technology 1 day ago
What are the Purposes of Black and White Levels? Photographic Science and Technology 2 days ago
Quattro MTF Charts Sigma Camera Talk 2 days ago
Quattro: why does blue channel workflow in BW no longer work? Sigma Camera Talk 3 days ago
Infrared ‘calibration’ Photographic Science and Technology 3 days ago
Fast standard prime for SD1: 30 EX DC Art 1.4 or 50 EX HSM 1.4 (not Art)? Sigma Camera Talk 4 days ago
diffraction and the quattro Sigma Camera Talk 4 days ago
Does this sound familiar? Sigma Camera Talk 5 days ago
infrared with SD1M + 85mm f1.4 Sigma Camera Talk 5 days ago
Tenpa mangnifying eyecup 1.22x for Sd1 info Sigma Camera Talk 5 days ago
i fill blue... and cracked Sigma Camera Talk 6 days ago
DP Aspect Ratio? Sigma Camera Talk 6 days ago
CAMF data format, who did know it? Sigma Camera Talk 6 days ago
lame review of the Q by apparent ignoramus Sigma Camera Talk 6 days ago
Recommended software for RW2 files of Panasonic G5 Micro Four Thirds Talk 1 week ago
Possible alternate raw processor for DP2Q and DPxM files Sigma Camera Talk 1 week ago
*** This Week Through YOUR m4/3 2014.06.09 *** Micro Four Thirds Talk 1 week ago
Are Moire patterns ever seen in monochrome cameras? Photographic Science and Technology 1 week ago
Jewelry Shots, Anybody? Sigma Camera Talk 1 week ago
Anyone use "OnOne" RAW converter software? Sigma Camera Talk 1 week ago
Diffraction limit Photographic Science and Technology 1 week ago
SD14 Extreme test image Sigma Camera Talk 1 week ago
What are these dark pixels? Sigma Camera Talk 1 week ago
What would the Ideal MP be for a FF 1:1:1 Foveon DSLR? Sigma Camera Talk 1 week ago
Lack of Top LCD Display on SD1 Sigma Camera Talk 1 week ago
Weekend Pix for the week ending August 22nd to 24th, 2014 Sigma Camera Talk 1 week ago
If u shoot sigma, u need SPP :-(. Here's one proof. Sigma Camera Talk 1 week ago
Possibly stupid question... why do larger sensors fare better in DxOMark's "low light" test? Photographic Science and Technology 1 week ago
Don't you just hate it when . . Sigma Camera Talk 1 week ago
Too sharp ? Sigma Camera Talk 1 week ago
SD1M in the 1930s Sigma Camera Talk 1 week ago
Dya reckon it's got a 3D perspective, especially around the exhaust Sigma Camera Talk 1 week ago
Quattro and AFE Sigma Camera Talk 1 week ago
RGB split channel noise reduction technology Photographic Science and Technology 1 week ago
I need a Reference for a Sensor MTF Formula :-( Photographic Science and Technology 2 weeks ago
Found the perfect subject to later process in SPP... Sigma Camera Talk 2 weeks ago
Musings on the Quattro sensor . . . Sigma Camera Talk 2 weeks ago
Sigma on google plus Sigma Camera Talk 2 weeks ago
Does the DP3 have higher resolution and IQ than the DP2Q? Sigma Camera Talk 2 weeks ago
My dp2q review Sigma Camera Talk 2 weeks ago
Merrill White Balance -- custom cards for warming effect Sigma Camera Talk 2 weeks ago