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Showing results 1 to 24 of 24 Search: Liked Posts
Forum: Pentax K-5 & K-5 II 12-14-2020, 08:04 PM  
K-5 For Astrophotography
Posted By DrMindbender
Replies: 1,131
Views: 347,722
No astrotracer? No EQ mount? No problem.

Just stack.
And stack.
And stack some more.
Then you stack.
And stack again.

Neowise with 300 exposures taken with a Pentax-A 50mm 1.7.

25-07-20-1 by Nicholas Luton, on Flickr
Forum: General Photography 12-14-2020, 06:21 PM  
Astrophotography -once in a life time challenge Jupiter and Saturn " double planet "
Posted By DrMindbender
Replies: 32
Views: 3,029
With one week to go, time for teasers. (Pentax K-5 w. Sigma 50-500mm f/4.5-6.3 APO DG OS HSM @ 500mm & Sigma APO EX DG 2x teleconverter. Manual focus. F-6.3. 1/125s. ISO 51200.)

_NRL7503 by Nicholas Luton, on Flickr
Forum: General Talk 12-24-2018, 09:07 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
An interesting little packaged which was delivered by Canada Post on a Sunday. I burned out the fungus (none internal) on the lens with hydrogen peroxide. However, I may need to use some ammonia to eliminate the "shadow" of the fungus on the glass.
Forum: Pentax K-5 & K-5 II 08-26-2018, 06:58 AM  
K-5 For Astrophotography
Posted By DrMindbender
Replies: 1,131
Views: 347,722
After reading through this thread, it got me interested in seeing what my K-5 could do last night. Considering that it was unmodified and horrible astronomy conditions with haze, cloud and the night before a full moon; I'm actually impressed with what it was able to do with my 28mm @ f2.8 & ISO 1600 with a 20 second exposure. It's enough to make me wonder if I should go after a faster 28mm.
Forum: General Talk 12-03-2018, 07:33 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
I don't expect anything special or even good. However, the chance to play with an extremely long lens (1-4 meters!), no matter how slow or poor quality images, was too tempting to not gather all the adapter parts for it. That and I'm in it for less than $100 total.
Forum: General Talk 11-13-2018, 02:52 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
Well, if I had any doubts that Magnicons were rebranded Tokinas... (Finally got the SH-522 hood for it.)
Forum: General Talk 11-05-2018, 01:22 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
That's #2 of 4.
Forum: General Talk 10-29-2018, 09:31 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
And now I have purchased my third Sigma KA zoom. A 70-210mm to go with my 75-210 & 75-300. Good thing that there is only one more that I have any interest in or else I would have a problem.
Forum: Troubleshooting and Beginner Help 10-27-2018, 08:06 PM  
Un-Macroing my telephoto lens.
Posted By DrMindbender
Replies: 12
Views: 1,077
So after attempting to disassemble my Sigma λII 75-300mm and putting it back together again, it suddenly has turned into a very good Macro lens. While it does have interesting possibilities in this current state, that's not what I bought it for.

There were no leftover parts and I know that it has something to do with how the front elements are reassembled. However, I'm at a loss as to how to correct it. I am considering buying a second model as a parts source and I should be able to use it to solve the problem once I have it. However, I would like to figure out this problem before it would arrive.

Thoughts?
Forum: General Talk 10-23-2018, 04:39 AM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
I'm currently having trouble getting past 4 weeks without a new lens purchase. :S (Mind you, I'm currently in the arsenal building phase of SLR photography and haven't had a "Why do you need this when you already have that?" moment yet.)
Forum: General Talk 10-21-2018, 07:30 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
I may need to open a Pentax museum at some point.
Forum: General Talk 10-13-2018, 04:38 PM  
Your latest acquisition
Posted By DrMindbender
Replies: 27,219
Views: 2,102,758
A Sigma "Lambda II" MF 75-300mm f4.5-5.6. Some fungus and the aperture ring is a touch stiff. (Not that big of an issue with a KA lens.) I heard good things about the lens and figured it was a good candidate for an eBay "as is" repair gamble.
Forum: Welcomes and Introductions 10-06-2018, 03:00 PM  
Pentax k5 advice
Posted By DrMindbender
Replies: 46
Views: 2,905
Most importantly, it will give you a better understanding of what you actually need when you decide to buy your next lens.
Forum: Welcomes and Introductions 10-01-2018, 08:13 PM  
Pentax k5 advice
Posted By DrMindbender
Replies: 46
Views: 2,905
One thing to keep in mind is that the K5's AF is temperamental in low light conditions. So it's best to use lenses that have a decent manual focusing ring if you want to capture night games.
Forum: Pentax DSLR Discussion 09-22-2018, 01:19 PM  
Why Do YOU Stay With Pentax?
Posted By DrMindbender
Replies: 165
Views: 13,721
Short answer: the lenses.

I had two lenses when I decided to get back into SLR photography this year; a Canon 200mm FL and a Pentax-M 28mm. Guess which one wasn't "Abandonware"? :)
Forum: Post Your Photos! 09-03-2018, 05:28 PM  
Night Deneb Region v2, now with more integration!
Posted By DrMindbender
Replies: 2
Views: 707
And it's images like this that are motivating me to look at building a barn door tracker. :)
Forum: Pentax Forums Giveaways 09-02-2018, 07:55 PM  
Official Pentax K-1 Summer 2018 Giveaway Discussion Thread
Posted By DrMindbender
Replies: 329
Views: 16,290
Of course, things will get interesting when I get a long lens. I mean, they will start thinking I'm trying to shoot down airplanes if I ever use something like this :lol: : APPROX. 600MM TELE LENS WITH PENTAX K BAYONET | eBay
Forum: Pentax Forums Giveaways 09-02-2018, 07:41 PM  
Official Pentax K-1 Summer 2018 Giveaway Discussion Thread
Posted By DrMindbender
Replies: 329
Views: 16,290
Likewise and also freaking out the neighbors with my astrophotography. :)
Forum: Pentax Forums Giveaways 09-02-2018, 07:25 AM  
August K-1 Giveway Thread #2 Duration
Posted By DrMindbender
Replies: 51
Views: 3,768
Well, it is a long weekend. :)
Forum: Pentax Forums Giveaways 09-02-2018, 07:10 AM  
It says I already entered?
Posted By DrMindbender
Replies: 31
Views: 3,006
The thing is, I actually did read it which is why I got concerned. The problem is, "and there will be no changes to the number of entries"can be interpreted in two ways: the 80 before the merger or the 240 overall.
Forum: Post Your Photos! 08-31-2018, 03:36 PM  
Nature Solar Eclipse 2017 - Patience or Procrastination
Posted By DrMindbender
Replies: 11
Views: 649
Nice! :) This is the sort of image that I'm hoping to pull off by the time of the next North American eclipse in 2024.
Forum: Troubleshooting and Beginner Help 08-25-2018, 11:31 AM  
How do you motivate yourself?
Posted By DrMindbender
Replies: 36
Views: 2,347
Find your nearest pet store and us it as your "I need something today" spot. Kittens and puppies are very motivating. :) Just let the frequency of how often you buy things from them determine how often you go during a month.
Forum: Welcomes and Introductions 08-23-2018, 09:16 PM  
Greetings from the Frozen North.
Posted By DrMindbender
Replies: 25
Views: 995
That's the plan. I've taken over 700 over the past two weeks since I got the K-5.
Forum: Welcomes and Introductions 08-23-2018, 08:29 PM  
Greetings from the Frozen North.
Posted By DrMindbender
Replies: 25
Views: 995
Hi from the mysterious land of Ontario, Canada. :) I recently decided to get back into photography after a long hiatus. Starting with salvaging my 28mm f2.8 from my P30t, I've built up a collection of four lenses for my recently acquired K-5 (a 70-210mm F4.5, a 28-70mm f3.5, a 50mm f1.4, and the one previously mentioned) which I'm now looking to learn how to use them to their full potential.
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