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Forum: Pentax K-1 2 Days Ago  
Post your K-1 pictures!
Posted By nightfly
Replies: 30,759
Views: 2,785,607
Jupiter is the "star" in question. Significantly brighter than the other point sources. This contributes to the effect.
Forum: Pentax Medium Format 09-04-2020, 05:20 PM  
Have all the satellites in the sky caused anyone photo problems?
Posted By nightfly
Replies: 15
Views: 1,275
A simple 60 second exposure with a DSLR and any lens under dark skies finds several satellite trails. They are annoying in post processing where they generally rear their heads. My long exposure 67 photos of the milky way seldom had trails due to longer integration times and less sensitivity of emulsion sensors.
Forum: Pentax Film SLR Discussion 04-18-2020, 02:54 AM  
Pentax 6x7 mystery part
Posted By nightfly
Replies: 3
Views: 482
I can't tell from your photo but it looks to be a long exposure mode for astrophotography. Aftermarket types were available at one time.

Hutech Astronomical Products - Pentax Battery Eliminator
Forum: Pentax Film SLR Discussion 02-17-2020, 04:11 AM  
Film and Cold Temperature
Posted By nightfly
Replies: 13
Views: 692
I've shot down to zero degrees F with 35mm and 6x7 with no problem. Pack the camera in your bag before returning indoors where condensation would be a problem. That bad for film AND the camera.

Allow the temperatures to moderate slowly by keeping all your cold weather acclimated gear sealed in the bag for several hours. How much time really depends on how cold the equipment was outside and how warm and humid the inside air is when trying to acclimate the equipment.
Forum: Pentax Medium Format 02-02-2020, 07:36 AM  
Post your medium format photos!
Posted By nightfly
Replies: 15,519
Views: 2,575,914
Working with the 67 and 55-100 Zoom and Pan F 50


Brackish Marsh - Schoodic Peninsula Acadia NP Maine
by James Cormier, on Flickr
Forum: Pentax K-5 02-02-2020, 07:14 AM  
Post Your K5IIs Pictures Here!
Posted By nightfly
Replies: 2,536
Views: 413,967
My K-5IIs still amazes me. Always does a great job in the most beautiful locations. I can trust it to do me right.

Ravens Nest, Aacadia NP, Maine, USA


The Ravens Nest
by James Cormier, on Flickr
Forum: Pentax Medium Format 01-29-2020, 03:42 PM  
Telescope adapter for 645D
Posted By nightfly
Replies: 22
Views: 2,316
An f/6 Newtonian has a 1" coma free image which is ideal for the 35mm frame. Faster coma free fields in faster Newtonian telescopes require a coma corrector. Of course this also requires a fully illuminated field, which would be at least a 2" focuser and an adequately large secondary mirror.

Large refractors, such as those make by AstroPhysics and TEC ($$$$) covered 6x7 film with exotic glass and correctors.
Forum: Pentax Medium Format 01-29-2020, 03:31 PM  
Pentax 67 400 4.0 ED IF - use with full format 35mm DSLR
Posted By nightfly
Replies: 18
Views: 2,389
I think you will find that the conventional glass lenses to be murder on digital sensors, especially the 300mm. I've used the 300 Takumar for 6x7 astrophotography with good results at f/5.6

The 400 Takumar actually performs better than the 300, which is a bit odd considering that they share the same glass technology. All things being equal, larger lenses have more spectrum aberrations.

With 6x7, the 300 is adequately sharp, but just barely so. I've pulled off some good work with it.
Forum: Pentax Medium Format 11-24-2014, 05:23 PM  
Post your medium format photos!
Posted By nightfly
Replies: 15,519
Views: 2,575,914
Some recent exposures on Tri-X dipped in Xtol. First is with the 200mm F/4 SMC 67, other two with the 55 F/4 SMC 67 lens. All with #3 yellow filter. All scanned on a V600.

Washington Junction by Nightfly Photographic, on Flickr

Barn Door by Nightfly Photographic, on Flickr


The Atlantic by Nightfly Photographic, on Flickr
Forum: Pentax K-5 10-17-2014, 11:56 AM  
K-5 For Astrophotography
Posted By nightfly
Replies: 1,105
Views: 301,148
I enjoy the work of many of the PF members posted here as well, there are many enthusiastic and talented folks posting great work! That being said, I appreciate the nice comment. Thank you.
Forum: Pentax K-5 10-09-2014, 03:34 AM  
K-5 For Astrophotography
Posted By nightfly
Replies: 1,105
Views: 301,148
It was clouded here during the eclipse, but I did get a good image of the Moon Monday night.

I used my 8" SCT @ F/6.3 and the K-5 IIs 1/750 second @ ISO 160. Post processed in PS to enhance contrast and detail. I'm generally pleased with it. The 30 year old optic did well.

Moon 10-6-14 by Nightfly Photographic, on Flickr
Forum: Pentax K-5 09-13-2014, 06:40 PM  
No more tests! just pictures
Posted By nightfly
Replies: 7,951
Views: 1,342,317
Last night's Aurora over Flanders Pond in eastern Maine

K-5 IIs 16mm Samyang @ f/2.8 16 seconds ISO 1600 cropped

Aurora Borealis September 12, 2014 by Nightfly Photographic, on Flickr
Forum: Pentax SLR Lens Discussion 08-29-2014, 12:41 PM  
Wide angle extremely sharp lens for night, nightsky and mostly star photography
Posted By nightfly
Replies: 25
Views: 5,505
I am interested in the O-GPS1 and hope to try one soon. That will make travel easier. I have been using an equatorially mounted telescope attached to a permanent pier. The camera rides "piggyback".

You can take a virtual tour of my roll off roof observatory here, the telescope, and the variety of cameras used.

https://www.flickr.com/photos/12598495@N08/sets/72157626760790621/

Taking images of the Milky Way from my home observatory lacks the variety of the scenic landscapes so often sought by photographers. For me, it is has always been about the Milky Way. But, I would like to try the O-GPS1 and move about.
Forum: Pentax Medium Format 08-29-2014, 09:44 AM  
Adapter from Pentax 67 lenses to Canon EOS
Posted By nightfly
Replies: 10
Views: 3,445
If you happen to have a 67 system, as I do, a cheap adapter to use the lenses on a digital body makes sense. They are not designed for digital to be sure, but usable nevertheless. In some cases the 67 glass outperforms modern lenses. I declare my 75mm f/4.5 SMC Takumar the sharpest lens in my bag and that is with it wide open. Even at pixel level it is tack sharp and renders beautifully. Made for film, but more than adequate for digital. Good luck and have fun with a whole new avenue of glass.
Forum: Pentax SLR Lens Discussion 08-29-2014, 09:37 AM  
Wide angle extremely sharp lens for night, nightsky and mostly star photography
Posted By nightfly
Replies: 25
Views: 5,505
Not being familiar with the 8-16, I cannot comment other than to say a prime is generally better corrected and in this case also faster. DXOMark ranked it highly.

It is rather sharp wide open but vignetting can be a bother. At f/2.2 the vignette is tolerable and can be corrected in post, by f/2.8 it is virtually gone.

Focus is internal and it takes 77mm filters. Build quality is also very nice.
Forum: Pentax SLR Lens Discussion 08-29-2014, 07:18 AM  
Wide angle extremely sharp lens for night, nightsky and mostly star photography
Posted By nightfly
Replies: 25
Views: 5,505
The Samyang and other versions fit like a Pentax A lens. It should fit fine and you will have automatic aperture as well. I use the Samyang 16 for astrophotography and you can check out more here, including one from last night.


https://www.flickr.com/photos/12598495@N08/sets/72157646579063277/
Forum: Pentax SLR Lens Discussion 08-25-2014, 09:58 AM  
Samyang for Astro/Night - 10/14/16
Posted By nightfly
Replies: 9
Views: 6,317
The max aperture was a major consideration. It is sharp wide open but I stop down when I want to control vignetting. The 10mm was not out at the time I purchased and the Sigma 18-35 / 1.8 was "vaporware" at the time. I needed a good wide for my K-5 IIs . My first copy was decentered but B&H cheerfully swapped copies.

Prices have fallen and I recommend giving one a try and return if your not satisfied.

Good luck!
Forum: Pentax DSLR Discussion 08-23-2014, 04:45 AM  
Astrophotography
Posted By nightfly
Replies: 1,218
Views: 284,122
I used my equatorial mount. I am going to try the Astrotracer at some point, but an equatorial mount guarantees perfect tracking every time without calibration issues that I often hear about. When I shoot a frame I don't want it to be an experiment.
Forum: Pentax SLR Lens Discussion 08-22-2014, 10:01 AM  
Samyang for Astro/Night - 10/14/16
Posted By nightfly
Replies: 9
Views: 6,317
Love my 16/2 Samyang. My first copy exhibited decentering, returned for another copy and it was good with performance on par with reviews. Some coma in the corners, but a very nice option, especially as prices have fallen. You can view my photostream on Flickr for more work with this lens.

This was 92 seconds at f/3.2 ISO 3200 under dark skies with my K-5IIs.

Milky Way - Detailed by Nightfly Photographic, on Flickr
Forum: Pentax DSLR Discussion 08-20-2014, 05:15 PM  
Astrophotography
Posted By nightfly
Replies: 1,218
Views: 284,122
A shot with the K-5 IIs and 16mm f/2 Samy @ f/3.2 and 92 seconds at ISO 3200. A bit over-processed, but I was pulling out some decent details from the raw file.

Milky Way - Detailed by Nightfly Photographic, on Flickr
Forum: Pentax K-5 08-20-2014, 05:11 PM  
Post Your K5IIs Pictures Here!
Posted By nightfly
Replies: 2,536
Views: 413,967
The K-5IIs excels in astrophotography.

Here is a 92 second tracked exposure using the Samyang 16mm f/2 @ f/3.2

Milky Way - Detailed by Nightfly Photographic, on Flickr
Forum: Pentax K-5 08-18-2014, 10:05 AM  
Post Your K5IIs Pictures Here!
Posted By nightfly
Replies: 2,536
Views: 413,967
K-5 IIs with SMC 67 200MM F/4 @ F/5.6

Morning Moon August 16 2014 200mm by Nightfly Photographic, on Flickr
Forum: Pentax K-5 08-11-2014, 06:15 PM  
No more tests! just pictures
Posted By nightfly
Replies: 7,951
Views: 1,342,317
The recent "Supermoon" at Acadia National Park, Maine

I used my Pentax 6X7 400MM f/4 SMC Takumar @ f/8 which did surprisingly well with the high contrast Moon. The lens is plenty sharp on a cropped sensor, but contrast can be a challenge in difficult lighting.


Blueberry Moon by Nightfly Photographic, on Flickr
Forum: Pentax Medium Format 07-09-2014, 03:45 AM  
Z ISO 51,200 for stars this morning
Posted By nightfly
Replies: 7
Views: 1,773
I would like to see how this camera fares with even longer exposures with an equatorial platform. I'm not so much interested in the foreground, but how this camera depicts the Milky Way and its starclouds. This image shows great potential for astrophotography over the D model. Thanks for doing this initial work to give us a taste of what the Z can do.
Forum: Pentax Medium Format 06-17-2014, 09:55 AM  
medium format lens on a full frame camera
Posted By nightfly
Replies: 14
Views: 4,834
I use several 6X7 lenses on my K-5IIs with good results. The 75 f/4.5 Takumar easily resolves the full pixel resolution of the sensor, and wide open no less. The 55 and 105 are similar in this regard, but the 75 totally lacks in CA problems. The SMC 67 200 f/4 does very well when used in this manner as well. Sharp enough for digital, but made for 6x7 film. A bit awkward to use, but if you already own a 67 system it's worth the cost of an adapter and try them on. Good luck.
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