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Orion Nebula with DA* 60-250mm lens
Lens: Pentax DA* 60-250mm f4 Camera: Pentax K5 Photo Location: Sointula, Malcolm island, BC ISO: 1600 Shutter Speed: Above 6s Aperture: F5.6 
Posted By: SointulArt, 01-11-2016, 10:12 PM

Last night the sky was clear and Orion looked magnificent in the sky. This is the first time I have tried to use my DA* 60-250mm lens for an astro photo and I was pleased with the results.
The technical details: Camera: Pentax K5; lens: Pentax DA* 60-250mm f4 zoom @ 200mm and f5.6; ISO =1600, exposure = 15 seconds using Pentax Astrotracer function of O-GPS1 unit. Forty-two shots stacked in DeepSkyStacker and then further processed in Photoshop CS4.

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01-11-2016, 10:47 PM - 1 Like   #2
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very nice!
01-11-2016, 10:50 PM - 1 Like   #3
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Beautiful shot
01-12-2016, 01:11 AM - 1 Like   #4
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Awesome shot! Did you do any darkframes?

01-12-2016, 08:52 AM   #5
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QuoteOriginally posted by WaxPhotographic Quote
Awesome shot! Did you do any darkframes?
No. No darks, flats or bias frames. This was a quick test to see how the lens would perform. The next clear night I will try a full suite of lights, darks, flats and bias frames and see how much better the result will be.
01-12-2016, 10:45 AM - 1 Like   #6
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How did you focus the lens
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01-12-2016, 12:45 PM - 1 Like   #7
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This is awesome! Congrats!
01-12-2016, 01:45 PM - 1 Like   #8
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Awesome shot!

01-12-2016, 06:13 PM - 1 Like   #9
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QuoteOriginally posted by gtis Quote
How did you focus the lens
Neil
I manually focused the lens using live view. Even though the 60-250mm zoom is f4, a few of the brighter stars in Orion are visible in live view and the stars pop into focus reasonably easily. Especially when zoomed to 10x view.
12-19-2017, 11:23 AM - 1 Like   #10
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QuoteOriginally posted by SointulArt Quote
Last night the sky was clear and Orion looked magnificent in the sky. This is the first time I have tried to use my DA* 60-250mm lens for an astro photo and I was pleased with the results.
The technical details: Camera: Pentax K5; lens: Pentax DA* 60-250mm f4 zoom @ 200mm and f5.6; ISO =1600, exposure = 15 seconds using Pentax Astrotracer function of O-GPS1 unit. Forty-two shots stacked in DeepSkyStacker and then further processed in Photoshop CS4.
Stunning!

Adam
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12-20-2017, 07:38 PM   #11
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Very nicely done, bravo!
12-20-2017, 09:43 PM - 1 Like   #12
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Heavenly.

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12-20-2017, 09:50 PM - 1 Like   #13
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Awesome!
12-21-2017, 05:25 PM - 1 Like   #14
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Incredible image, I would love to try something like this with my K1 and D FA 150-450.
I have never used the Astrotracer before.
I have taken multiple night images and stacked them for star trails. So I am somewhat familiar with that part of the process.
Where and when to aim the lens would be the area that I lack the needed knowledge.
Any suggestions to point me in the right direction would be greatly appreciated.
Thanks Scott.
12-21-2017, 06:16 PM   #15
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QuoteOriginally posted by scottab Quote
Incredible image, I would love to try something like this with my K1 and D FA 150-450.
I have never used the Astrotracer before.
I have taken multiple night images and stacked them for star trails. So I am somewhat familiar with that part of the process.
Where and when to aim the lens would be the area that I lack the needed knowledge.
Any suggestions to point me in the right direction would be greatly appreciated.
Thanks Scott.
Hi Scott, I am assuming you have an the O-GPS1 unit to enable the astrotracer function. I'm not sure how successful you will be with using the 15-450mm lens. You would probably want to start at the shorter focal length end and work your way up, as the astrotracer works pretty well up to around 200mm, but may not be able to track for long at 450mm. Also, calibrating the O-GPS1 requires rotating/rolling the camera with the unit attached in all three axis, and that may be a little challenging with the big lens attached - be careful! With the K1 you should be able to dial the ISO up reasonably high so as to keep the exposure time down. The only thing to do is to experiment and see what you find works, In order to find things in the sky, there are some good free apps out there for your phone that can help you find objects in the night sky, for example Stellarium (available for android, iOS and for desktop), Sky Map 9android) and many others.

Have fun!
Darryl
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