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Joined on Feb 25, 2010

Recent activity


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

Subject Forum Last post
Telescope vs. Camera Lens Astrophotography Talk Forum 2 months ago
Need guidance on how to start astrophotography with telescope & DSLR Astrophotography Talk Forum Apr 11, 2017
Advice on Sky Tracker Astrophotography Talk Forum Feb 25, 2017
why over-price [mirrorless] then crash. Why not price it correctly? Open Talk Jul 4, 2016
Prime focus with Muksutov-Cassegrain? Astrophotography Talk Forum Jan 7, 2016
Why are mirrorless cameras so expensive? Micro Four Thirds Talk Dec 15, 2015
What do I need to be able to display light spectrums? Photographic Science and Technology May 30, 2015
fun, weird, cheap and/or cult classic cameras Open Talk May 6, 2015
Sensor with 6 stops of DR used for fifty years... Open Talk May 4, 2015
Can someone explain how "total light" hitting the sensor affects IQ? Open Talk May 2, 2015
Show me YOUR "lonely" benches ............. Micro Four Thirds Talk Apr 17, 2015
Suugestions wanted for light, sharp FF 200mm or 70/80-200mm for hiking Sony Alpha Full Frame E-mount Talk Feb 22, 2015
How to process a 6D file to match the DR of a Sony or Nikon Canon EOS-1D / 5D / 6D Talk Dec 25, 2014
What IS the ColorTemperature 17 minutes after sunset with high red clouds? Open Talk Dec 19, 2014
Sigma now releasing Geometric and Diffraction MTF charts for lenses Photographic Science and Technology Dec 1, 2014
Quick Test of Olympus 50mm f/1.8 Legacy Lens Astrophotography Talk Forum Dec 1, 2014
Do high quality Aluminum Tripods exist vs Carbon Fiber? Accessories Talk Jun 1, 2014
tilt shift question Open Talk Apr 26, 2014
GNU Octave, or…? Photographic Science and Technology Apr 21, 2014
MTF: I think I Isolated the D610 Directional AA filter's MTF Curve Photographic Science and Technology Apr 20, 2014
M81 and M42 Astrophotography Talk Forum Apr 11, 2014
M101, SkyTracker, and 200mm lens Astrophotography Talk Forum Apr 10, 2014
Messier 64 - the "Black Eye Galaxy"! Astrophotography Talk Forum Apr 9, 2014
What are Zeiss manual lenses? Looks like they're coming for FE mount Sony Alpha / Nex E-mount (APS-C) Talk Apr 8, 2014
polarizing filter - how to set it ? Open Talk Apr 8, 2014
Tired of chasing my tail. Can't decide ;-( Open Talk Apr 5, 2014
Equatorial mount or not? Astrophotography Talk Forum Apr 3, 2014
See through clothing - the filter that strips you naked. Open Talk Apr 2, 2014
Need Small P&S For Use As Light Meter Open Talk Apr 2, 2014
Best built lenses ever? Open Talk Mar 31, 2014
Messier 13 from last night! Astrophotography Talk Forum Mar 31, 2014
Whirlpool Galaxy inverted due for background galaxies! Astrophotography Talk Forum Mar 25, 2014
First try on M51 - the "Whirlpool Galaxy"! Astrophotography Talk Forum Mar 24, 2014
median method creates blurry images? Astrophotography Talk Forum Mar 24, 2014
It was clear for a few hrs last night ! Astrophotography Talk Forum Mar 22, 2014
Filters Sony Alpha / Nex E-mount (APS-C) Talk Mar 22, 2014
Novoflex vs. Arca Swiss vs. RRS Accessories Talk Mar 21, 2014
What lens do you use? Astrophotography Talk Forum Mar 21, 2014
Do ND filters increase diffraction? Photographic Science and Technology Mar 20, 2014
How is size of entrance pupil used to set aperture opening for a given f-stop? Photographic Science and Technology Mar 13, 2014
Which gears to bring for taking the milky way? Astrophotography Talk Forum Mar 6, 2014
The Large Magellanic Cloud Astrophotography Talk Forum Mar 3, 2014
D7100: noise as function of ISO vs exposure time Astrophotography Talk Forum Mar 2, 2014
What are the bit depths on the NEX and A7 cams raw files? Sony Alpha Full Frame E-mount Talk Feb 28, 2014
Saturn passing behind the moon. Astrophotography Talk Forum Feb 28, 2014
Spot the Error Photographic Science and Technology Feb 28, 2014
SMI (Sensitivity Metemerism Index) -- is it important? Photographic Science and Technology Feb 27, 2014
Rosette Nebula Astrophotography Talk Forum Feb 23, 2014
Best Looking Camera- YOUR TAKE? Open Talk Feb 22, 2014
Definition of Macro Lens Open Talk Feb 20, 2014