xpatUSA

xpatUSA

Lives in United States TX, United States
Works as a Retired Engineer
Joined on Dec 15, 2011
About me:

Just interested in the technology.

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

Subject Forum Last post
Anyone use the Sigma 50mm 2.8 EX DG? Sigma Camera Talk 46 min ago
What am I doing wrong? (color noise Sigma SD Quattro @ ISO 100) Sigma Camera Talk 1 hour ago
Current State-of-the-Art in SPP Processing Alternatives? Sigma Camera Talk 11 hours ago
La caméra magique Sigma Camera Talk 17 hours ago
Fascinating AI-based upscaling results Photographic Science and Technology 1 day ago
Why aren't we on the L Forum?? Sigma Camera Talk 2 days ago
Monochrome Images for the Month of September 2021 Sigma Camera Talk 2 days ago
Camera For The Month: DP2/S/X Sigma Camera Talk 2 days ago
Pix for the Week Ending September 10th to 12th, 2021 Sigma Camera Talk 2 days ago
What has gone wrong in this picture? Sigma Camera Talk 3 days ago
Ricoh releases DP2 style fixed lens camera Sigma Camera Talk 3 days ago
Sorry if this has been discussed before... Sigma Camera Talk 3 days ago
Question about Sensor Performance Photographic Science and Technology 4 days ago
Pix for the Week Ending September 3rd to 5th, 2021 Sigma Camera Talk 5 days ago
Still patiently waiting for the next 1:1:1 Foveon camera ... Sigma Camera Talk 5 days ago
Should Sigma make a 30 MP per layer full-frame Foveon instead of 20 MP per layer? Sigma Camera Talk 5 days ago
Quattro jpeg vs x3f processing in SPP Sigma Camera Talk 5 days ago
Today's Sunspots from Sydney... Sigma Camera Talk 5 days ago
File viewer for X3F files? Sigma Camera Talk 6 days ago
Orange Goblins Sigma Camera Talk 1 week ago
Correct Perspective? Photographic Science and Technology 1 week ago
Opinon needed on Oly 300mm F4 vs 100-400mm Sigma Camera Talk 1 week ago
FP vs FP-L Sigma Camera Talk 1 week ago
Sigma fp & fp-L effective pixels for APS-C format lenses Sigma Camera Talk 1 week ago
FP L - Just how bad is it really? Sigma Camera Talk 1 week ago
Is there a handy model that works like this? Photographic Science and Technology 1 week ago
Pentax DA 18-55/18-135 on the Quattro/SD Sigma Camera Talk 1 week ago
fp L first image Sigma Camera Talk 1 week ago
A Member's Website blocked by Norton today Open Talk 1 week ago
Sigma (2002) Sigma Camera Talk 1 week ago
Pix for the Week Ending August 13th to 15th, 2021 Sigma Camera Talk 2 weeks ago
Best way to teach exposure triangle? Open Talk 2 weeks ago
onboard/OCF flash options DP1, DP2 (classic and Merrill) and SD Q Sigma Camera Talk 2 weeks ago
Going from original DP1 to DP0 Quattro. Disappointed, where to next? Sigma Camera Talk 2 weeks ago
Pix for the Week Ending August 27th to 29th, 2021 Sigma Camera Talk 2 weeks ago
Interested in Sigma for B+W photography Sigma Camera Talk 2 weeks ago
This year is going to be the year I go with a single RAW tool Retouching 3 weeks ago
17-50mm Lens on an SD1 Merrill - Sharpness Field. Sigma Camera Talk 3 weeks ago
SIGMA 14mm in storage has tackyness on rings? Sigma Camera Talk 3 weeks ago
Battery charger question fp L and dp0 Sigma Camera Talk 3 weeks ago
Photoshop Elements and Quattro Sigma Camera Talk 3 weeks ago
Who would want (buy) L-mount APS-C Foveon sensor camera? Sigma Camera Talk 3 weeks ago
Monochrome Images for the Month of August, 2021 Sigma Camera Talk 3 weeks ago
Heartrending time of life Sigma Camera Talk 3 weeks ago
sRGB colors oversaturated on sRGB display after editing in AdobeRGB Retouching 3 weeks ago
Autumn is here Sigma Camera Talk 3 weeks ago
Pix for the Week Ending August 20th to 22nd, 2021 Sigma Camera Talk 3 weeks ago
Wildlife with a Sigma SD1 Merrill and 100-400mm OS lens Sigma Camera Talk 3 weeks ago
SD9 Bargain ... Sigma Camera Talk 4 weeks ago
InfraRed Gold & InfraRed Red Sigma Camera Talk 4 weeks ago