J Posthuma

J Posthuma

Lives in Netherlands Utrecht, Netherlands
Joined on Feb 6, 2011

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Subject Forum Last post
Length of DA 18-135/DA 18-250/DA* 50-135/Tamron 70-300 Macro? Pentax SLR Talk 4 hours ago
High ISO Deer Photos (10 images) Pentax SLR Talk 3 days ago
Show me YOUR "lonely benches" :-) Pentax SLR Talk 4 days ago
Barred Owl Pentax SLR Talk 5 days ago
Sharpest lens I ever had Pentax SLR Talk 1 week ago
Help me out: How to crop? Pentax SLR Talk 1 week ago
Jupiter with Meade ETX90 and Pentax Q Astrophotography Talk Forum 1 month ago
Sigma 8-16 does Catch-In-Focus Pentax SLR Talk 2 months ago
Jupiter with SMC 500mm f4.5 and K5IIs Pentax SLR Talk 2 months ago
OT: Duck's POOING in action (1 pic) Pentax SLR Talk 2 months ago
Some tilt-fun Pentax SLR Talk 2 months ago
Andromeda in a Light Polluted Sky Astrophotography Talk Forum 2 months ago
small anecdote Pentax SLR Talk 3 months ago
K30 fried after using in rain Pentax SLR Talk 3 months ago
Multiple Exposure Technique for Star Fields Astrophotography Talk Forum 3 months ago
Finished building the Barndoor tracker. Astrophotography Talk Forum 3 months ago
T-Adapter/Barlow Lens Question Astrophotography Talk Forum 3 months ago
Samyang 800mm Mirror lens Part I Astrophotography Talk Forum 3 months ago
Perseid Composites Astrophotography Talk Forum 3 months ago
The Old Man and His Friend Pentax SLR Talk 3 months ago
How can I improve my moon images? Astrophotography Talk Forum 3 months ago
Quadrantits meteor shower. failed !!! Astrophotography Talk Forum 3 months ago
New K-3 review from Ed at photouniverse Pentax SLR Talk 3 months ago
Moon with the Tamron SP 500mm F/8 Mirror Lens. Astrophotography Talk Forum 3 months ago
How to improve efficiency of my workflow? Astrophotography Talk Forum 3 months ago
More Friendly Deer (10 photos) Pentax SLR Talk 3 months ago
Moon Mosaic/Pano finished! Astrophotography Talk Forum 3 months ago
'Merlin' tracking mount for beginner? Astrophotography Talk Forum 3 months ago
Coastal (California+) - Feel free to Add Your Shots Pentax SLR Talk 3 months ago
Imaging Through Murky Skies - M35 & NGC 2158 Astrophotography Talk Forum 3 months ago
Rosetta Nebula - 180mm F/2.5 Astrophotography Talk Forum 3 months ago
THE BEST CAMERA FOR MILKYWAY Astrophotography Talk Forum 3 months ago
Farm lost in the fog with Da 20-40mm ( photo) Pentax SLR Talk 3 months ago
M42 with Canon 70D and TV Genesis SDF Astrophotography Talk Forum 3 months ago
Warning Time Lapse contains stars and daylight ...https://vimeo.com/83778705 Astrophotography Talk Forum 3 months ago
one more attempt at horsehead and flame Astrophotography Talk Forum 3 months ago
A few nightscapes of our local pier with the DA 20-40 Pentax SLR Talk 3 months ago
The Marble Pentax SLR Talk 3 months ago
What 2 mp can do Pentax SLR Talk 3 months ago
Samyang 800mm mirror lens Part II Astrophotography Talk Forum 3 months ago
Comet Panstarrs + aurora (E-330 + Hexanon 55mm F/1.2, ISO 800, 4sec, f=1.2) Astrophotography Talk Forum 3 months ago
Rather new here, some results with moderate means Astrophotography Talk Forum 3 months ago
Comparing EXIF info. on Photo I took from my Gallery. Pentax SLR Talk 3 months ago
Photos: Paths (K-5+DA15&DA70) Pentax SLR Talk 3 months ago
Welcome interloper Pentax SLR Talk 3 months ago
K3 in very low light Pentax SLR Talk 3 months ago
Mantis trick . Pentax SLR Talk 3 months ago
Massive solar flare to hit Earth Astrophotography Talk Forum 3 months ago
Shooting over more than one night and darks Astrophotography Talk Forum 3 months ago
Remember Mum Guarding the Eggs Pentax SLR Talk 3 months ago