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09-30-2016, 04:16 AM   #1
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Anyone done much astro on the K-1 with FF lenses? (e.g. 15-30, 31)

Anyone done much astro on the K-1 with FF lenses? (e.g. 15-30, 31)

Be interested to see the results!

09-30-2016, 07:40 AM   #2
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This was with a 35mm Fujinon. Literally my first chance to have a few minutes with a clear enough sky to fire off some astro shots with a clear sky. If the rain here stops, I hope to do some more serious shots next week.

Single exposure ISO400 26 seconds.



There's a bit of trailing in the corners, as is to be expected with a lens this width, and some noise, which could have been remedied with multiple exposures or a longer exposure at a lower ISO, as well as dark/light frame subtraction.

This was in a fairly populated area, so you'll notice some light pollution in the lower right.
09-30-2016, 08:47 AM   #3
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QuoteOriginally posted by Conqueror Quote
Anyone done much astro on the K-1 with FF lenses? (e.g. 15-30, 31)

Be interested to see the results!
This was my first attempt at using my K-1, 15-30, and astro tracer. I couldn't get the gps calibration to work most likely because I was on top of a very large volcano.

09-30-2016, 09:31 AM   #4
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One thing I will test next time I am going to use the Astrotracer is to calibrate with the LCD in its home position, set up the shot with the LCD where I want it and then re-seat the LCD when it is time to shoot. I think this can make the tracking better since my early attempts has been 50-50 compared to K-3 and K-5 with more like 80-20 good shots.

09-30-2016, 09:34 AM   #5
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I did shoot with the DA40 (forced FF mode) and the 16-85 (which vignettes but creates nice results).
09-30-2016, 11:42 AM - 1 Like   #6
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This is a composite of two shots taken with the K-1 and Rokinon 14/2.8.

The Milky Way shot was taken with Astrotracer, f/2.8, ISO 1600, 172s.

09-30-2016, 12:23 PM - 2 Likes   #7
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Yes, With the Tamron 70-300mm :



Ricoh IMAGING COMPANY, LTD. Pentax K-1
TAMRON AF70-300mm F/4-5.6 LD MACRO
ƒ/8.0 300.0 mm 80s Iso 12800
09-30-2016, 02:48 PM   #8
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QuoteOriginally posted by loco Quote
This is a composite of two shots taken with the K-1 and Rokinon 14/2.8.

The Milky Way shot was taken with Astrotracer, f/2.8, ISO 1600, 172s.

@loco - A truly gorgeous shot. That Rokinon 14 shows only minimal trailing in the corners in this image. Did you crop it at all?

09-30-2016, 03:24 PM   #9
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QuoteOriginally posted by jbinpg Quote
@loco - A truly gorgeous shot. That Rokinon 14 shows only minimal trailing in the corners in this image. Did you crop it at all?
Many thanks for your kind words! The Milky Way shot was only very slightly cropped, mostly to get rid of a bit of vignetting in the upper right and left corners.
09-30-2016, 04:14 PM - 1 Like   #10
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It is a very well designed feature. I mainly use the 15-30 which trails about the same as the 14mm Rokinon. Below is a work in progress still need to pull in the non tracked base.
Key with ultra wides is frame shot with Milky Way in the center of possible.


Paul C
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10-01-2016, 06:34 PM   #11
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QuoteOriginally posted by ZeGaby Quote
Yes, With the Tamron 70-300mm :



Ricoh IMAGING COMPANY, LTD. Pentax K-1
TAMRON AF70-300mm F/4-5.6 LD MACRO
ƒ/8.0 300.0 mm 80s Iso 12800
WOW! Great work! Is that 80 seconds a stack of several images or one 80 second shot?

obin
10-02-2016, 01:27 PM - 1 Like   #12
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From a few nights ago, K1, 15-30 ISO 500, 46 seconds total. Astrotracer. As Milky Way is off center, there were some trails through the Milky, but not enough that I felt it mattered. Other option was trying to wade out in waist deep water, but at night felt it was not the best idea.

Paul C

10-02-2016, 01:33 PM   #13
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QuoteOriginally posted by Obin Robinson Quote
WOW! Great work! Is that 80 seconds a stack of several images or one 80 second shot?

obin
Thanks a lot,
This is a single 80s shot !
10-08-2016, 07:52 AM - 2 Likes   #14
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One from last weekend. Had no choice but to shoot with the M Way towards the top of the shot, thus trails occurred due to retro-focus lens and Astrotracer issues. It's interesting to note that it's possible that iOptron traced shots may not have this same problem as I have seen several from MF and the 28mm F 4.5 lens (17mm 35mm equivalent) which seem to handle the edges better. This is actually a combination of several files, Astrotracer for the sky, then a series of long exposures, non traced for the Bluff illuminated with a single lantern.

Paul C

10-09-2016, 02:34 PM - 1 Like   #15
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I have had some success with the K1 and FA31. I had trouble with the calibration at first as I was trying to rotate the camera 360° but have found it better to just keep hold of it and rotate/twist back and forward to get the 180° movement. Here is the Milky Way with centre and corner crops. The tracking worked well with some coma showing at the corner. I will try to stop down some more next time. Just got the Samyang 14 as well so looking forward to getting away from the lights again soon.
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