wfektar

wfektar

Lives in United States United States
Joined on Feb 25, 2010

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Subject Forum Last post
MTF: I think I Isolated the D610 Directional AA filter's MTF Curve Photographic Science and Technology 1 day ago
Need guidance on how to start astrophotography with telescope & DSLR Astrophotography Talk Forum 5 days ago
M81 and M42 Astrophotography Talk Forum 1 week ago
M101, SkyTracker, and 200mm lens Astrophotography Talk Forum 1 week ago
Messier 64 - the "Black Eye Galaxy"! Astrophotography Talk Forum 1 week ago
GNU Octave, or…? Photographic Science and Technology 1 week ago
What are Zeiss manual lenses? Looks like they're coming for FE mount Sony Alpha/NEX E-mount Talk 1 week ago
polarizing filter - how to set it ? Open Talk 1 week ago
tilt shift question Open Talk 1 week ago
Tired of chasing my tail. Can't decide ;-( Open Talk 1 week ago
Equatorial mount or not? Astrophotography Talk Forum 2 weeks ago
See through clothing - the filter that strips you naked. Open Talk 2 weeks ago
Need Small P&S For Use As Light Meter Open Talk 2 weeks ago
Best built lenses ever? Open Talk 3 weeks ago
Messier 13 from last night! Astrophotography Talk Forum 3 weeks ago
Advice on Sky Tracker Astrophotography Talk Forum 3 weeks ago
Whirlpool Galaxy inverted due for background galaxies! Astrophotography Talk Forum 4 weeks ago
Telescope vs. Camera Lens Astrophotography Talk Forum 4 weeks ago
First try on M51 - the "Whirlpool Galaxy"! Astrophotography Talk Forum 4 weeks ago
median method creates blurry images? Astrophotography Talk Forum 4 weeks ago
It was clear for a few hrs last night ! Astrophotography Talk Forum 4 weeks ago
Filters Sony Alpha/NEX E-mount Talk 4 weeks ago
Novoflex vs. Arca Swiss vs. RRS Accessories Talk 1 month ago
What lens do you use? Astrophotography Talk Forum 1 month ago
Do ND filters increase diffraction? Photographic Science and Technology 1 month ago
why over-price [mirrorless] then crash. Why not price it correctly? Open Talk 1 month ago
How is size of entrance pupil used to set aperture opening for a given f-stop? Photographic Science and Technology 1 month ago
Which gears to bring for taking the milky way? Astrophotography Talk Forum 1 month ago
The Large Magellanic Cloud Astrophotography Talk Forum 1 month ago
D7100: noise as function of ISO vs exposure time Astrophotography Talk Forum 1 month ago
What are the bit depths on the NEX and A7 cams raw files? Sony Alpha/NEX E-mount Talk 2 months ago
Saturn passing behind the moon. Astrophotography Talk Forum 2 months ago
Spot the Error Photographic Science and Technology 2 months ago
SMI (Sensitivity Metemerism Index) -- is it important? Photographic Science and Technology 2 months ago
Rosette Nebula Astrophotography Talk Forum 2 months ago
Best Looking Camera- YOUR TAKE? Open Talk 2 months ago
Definition of Macro Lens Open Talk 2 months ago
Advice for someone new to astrophotography, and some C&C Astrophotography Talk Forum 2 months ago
Pleiades Blue Ice Astrophotography Talk Forum 2 months ago
Identification and Measurement of Photographic Filter Spectra with Low-Cost Equipement Photographic Science and Technology 2 months ago
Measured Transmission Curve of Photographic Filters Photographic Science and Technology 2 months ago
The most detailed images of Pluto here...... Astrophotography Talk Forum 2 months ago
Battery holders for AA batteries Astrophotography Talk Forum 2 months ago
Silly Signs... Sony Alpha/NEX E-mount Talk 2 months ago
Andromeda & Aurora Astrophotography Talk Forum 2 months ago
What do I need to be able to display light spectrums? Photographic Science and Technology 2 months ago
Andromeda in a Light Polluted Sky Astrophotography Talk Forum 2 months ago
My biggest annoyance with the A7 after ownign for 2 months?!? Sony Alpha/NEX E-mount Talk 2 months ago
More Perseid Composites Astrophotography Talk Forum 2 months ago
M101, Pinwheel galaxy Astrophotography Talk Forum 2 months ago