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Forum: Photographic Technique 04-13-2016, 03:37 PM  
Astrotracer shows trails, what am I doing wrong?
Posted By gatorguy
Replies: 107
Views: 21,428
My local mentor used the "Rule of 500", probably just a smaller number for what you mentioned. In essence divide your lens effective focal length into 500 and that's the max number of seconds before blur creeps in. Note that using the same lens on a full-frame would give you a different number than on a crop-sensor.

FWIW I just ordered the Pentax O-GPS to use with my K-s2. Figure I'll wing it and figure it out on my own when it arrives since the camera manual description is so convoluted it makes little sense to me. I just hope I don't end up with leftover parts like I do when I "wing it" putting furniture together. :D

EDIT: Just read the instructions two more times. I think I get it now, but we'll see.
EDIT2: Well that didn't work out as planned. the on-line retailer who advertised at a pretty cheap price, less than $160 new, doesn't actually have any in stock to sell. Two to three weeks? No thanks. B&H, here I come.
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