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07-20-2021, 08:43 PM   #61
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QuoteOriginally posted by kypfer Quote
not quite the case, the K-3iii does it as well
Thanks @kypfer! Well gobsmacked I'll remain......didn't think about the NKOTB (K3-3). This thread might have started when the K3-3 was just a twinkle in someone's eye. I like my Kp for nightscapes even more now!

11-28-2021, 07:32 AM   #62
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I can't get my K70 to use Astrotracer in Bulb or manual mode. I do the calibration and make sure the GPS is on etc. I may try getting out of town to see if it's a GPS problem.

The only way I can get any success is with the user3 mode Astrophoto. I can get 20 seconds without startrailing with the 55-300 HD WR lens at 300mm.
I turned off noise reduction in this mode as I wanted the RAW files unedited.
I may try turning the inbuilt noise reduction on again, to see how the jpgs turn out for stacking.

With my K5 I can use the Astrotracer in Bulb mode, and use a remote to open/close the shutter as needed. It seems more straight forward with the K5.
6 Days Ago - 1 Like   #63
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QuoteOriginally posted by scotty1 Quote
I can't get my K70 to use Astrotracer in Bulb or manual mode. I do the calibration and make sure the GPS is on etc. I may try getting out of town to see if it's a GPS problem.
The only way I can get any success is with the user3 mode Astrophoto. I can get 20 seconds without startrailing with the 55-300 HD WR lens at 300mm.
I turned off noise reduction in this mode as I wanted the RAW files unedited.
I may try turning the inbuilt noise reduction on again, to see how the jpgs turn out for stacking.
With my K5 I can use the Astrotracer in Bulb mode, and use a remote to open/close the shutter as needed. It seems more straight forward with the K5.


Not quite sure what the question is in Bulb Mode, the infamous Green Button switches from manual control to timed release, 10sec to 20min not sure why one would need to use Manual for Astro' work.
Have you activated Astrotracer in the menu or on the control panel? the User3 'Astrophoto' seems to do that by default.
I usually take the Astrophoto settings as a perfectly good starting point and set the exposure time to suit the combination of focal length, background pollution, working aperture and ISO.
The camera will limit the exposure time available depending on the focal length, but this setting seems to be only a compromise, as shutter speeds need to be shorter with the camera pointing near the celestial equator than they do to the celestial pole.
Depending on the number of exposures required, in-camera noise reduction can be very adequate, until such time as it starts to be a nuisance 'cos it takes longer than you'd like At this point you can switch noise reduction off to save time making actual exposures, but you'll need to spend time at some point making 'darks' and 'flats' etc. later to compensate very much an individual choice
I've only tried cameras other than my K-70 very briefly with the GPS module the K-70 just seems to be so much easier to use, with it's fully articulated screen.
If I remember correctly, the K-5 has a reduced set of features, compared to the K-70, so that might be why it seems "easier" to use.
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Hi thanks for replying

Yes I tried all the menu settings, and calibrating the GPS then the Astrotracer . I was able to get good shots in the Astrophoto mode, so I will stick with that unless I can work out the other modes. Sometimes the Astrotracer just doesn't play ball maybe it's the signal, or interference from metallic objects.

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QuoteOriginally posted by scotty1 Quote
Sometimes the Astrotracer just doesn't play ball maybe it's the signal, or interference from metallic objects.


Absolutely because of my domestic location I almost invariably drive out a few miles to get clear of at least some of the light pollution and more than just a fixed field of view. By trial and error I've found that if the camera is within about 10ft of the car when I try to calibrate or use it, the results are likely to be poor.
By using an ordinary old-fashioned hand-held compass in relation to the North Star I was able to ascertain my little Renault was distorting the local magnetic field quite extensively, and that was with everything switched off I'd imagine a larger vehicle could be even worse!
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QuoteOriginally posted by kypfer Quote
By using an ordinary old-fashioned hand-held compass in relation to the North Star I was able to ascertain my little Renault was distorting the local magnetic field quite extensively, and that was with everything switched off … I'd imagine a larger vehicle could be even worse!
Likely. Where I shoot there is a spot where I seem to get the best results and have my car parked on the other sideof the lot and there are a fe sign posts, a picnic table and big park provided barbecue that I need to stay away from. Iron is everywhere and it will throw it off but it can be avoided or minimized.
1 Day Ago   #67
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Yeah when I used my K70 the other day , I drove a few miles from town to get darker skies. I made sure I was a good twenty feet from the car when I calibrated the Astrotracer. I expect telephone cables or underground cables may effect the GPS too.

We had a fair area of undeveloped land by my area. Unfortunately there is ALOT of new buildings going up, this will create alot more light pollution nearby.

I guess it's the same world over, it's getting harder to find dark skies nearby.

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Tried something I hadn't before tonight,
I calibrated the Astrotracer with my camera on the tripod. It was a bit awkward, but I felt less likely to drop the tripod, rather than calibrating the camera by itself. Firstly I calibrated the GPS in the wrench menu, then calibrated the astrotracer in the astrotracer menu. I was then able to use the bulb mode, instead of the user mode 3 astrophoto. I did this in the back garden. Next time I'm out of town trying astro, I will use the calibrate on the tripod method.

Last edited by scotty1; 1 Hour Ago at 06:30 PM.
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