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Forum: Troubleshooting and Beginner Help 3 Days Ago  
Vanguard BBH-200 ball head - mounting screw problem
Posted By interested_observer
Replies: 11
Views: 489
This is very fixable and as others have posted, getting the broken part extracted is going to be your greatest problem. The part is called a 3/8"-16 to 1/4"-20 Reducer Bushing. If you don't want to futz with it yourself, I would suggest taking it down to any local machine shop, tool and die or what have you, that is close by. It will be about a 5 minute process for them. With the above 1/4"-20 information, the shop will have the tap to extract it. This happens in their business all the time.

I would suggest that when you order another one - you get three, as they are reasonably cheap and an extra or two in your spare parts kit comes in handy.

:cool:
Forum: Sold Items 6 Days Ago  
For Sale - Sold: Pentax Auto Bellows M Set & SMC Pentax Bellows 100mm F4
Posted By interested_observer
Replies: 1
Views: 273
PM sent....

:cool:
Forum: Pentax SLR Lens Discussion 01-07-2021, 11:22 PM  
Takumar 50mm F/1.4 - 8 Element vs 7 Element
Posted By interested_observer
Replies: 1
Views: 424
With my web surfing this evening, I stumbled across this on youtube.
















You Tube




:cool:
Forum: Welcomes and Introductions 12-27-2020, 11:57 PM  
Always so many new members as last 24h?
Posted By interested_observer
Replies: 18
Views: 629
Welcome to the Forum!!! Your English is excellent compared to my non-existent Polish. Just in case you have not come across this - here is an excellent article on setting up your K1.Also, here is a very good overview of the camera in this K1 Tutorial















You Tube




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Forum: Photographic Technique 12-23-2020, 02:50 PM  
Astro beginning in astro photography with minimal equipment
Posted By interested_observer
Replies: 28
Views: 1,387
You really need to define inexpensive.....

Film Camera

Let's say you score an old film body with a 135mm lens on the cheap - for free along with a tripod (thus no out of pocket capital costs). Then there is the reoccurring cost of film, development and digital scanning.
  • Color film - buy for $10 roll (36 frames), $5 for development (with scanning)

  • Black & White film - buy for $10 roll (36 frames) and you develop it yourself and scan it yourself (say buy a scanner for $100). But to get color images,you need to shoot 3 to 4 frames (with different color filters) and then stack them digitally (keeping track of which frame used what color filter)

Now, when you are shooting the frames, you need to shoot 8 to 16 frames per object and stack them in order to capture sufficient light so that they start to actually show up. Just for the ease of the numbers.
  • Color film - 1 roll per object so $15 per shooting the sky object.

  • B&W film - 3 rolls per object (RBG color filters), with you doing the developing and scanning, so about $30 per object (plus chemicals).

_______________________________________

Digital Camera

Using the lens and tripod you scored with the film camera for free - you will need to buy a digital camera potentially with a GPS tracker to extend the duration of your exposures. Let's use a K70 (you can find them for ~$450) and a O-GPS1 (~$120), which totals about $570. To really get longer exposures for deep sky objects, you will need an equatorial tracker like an ioptron (runs about $500+).

A friend shoots astro (Milky Way over landscapes) with a K70, O-GPS1 using a Sigma 18-35/f1.8, using a tripod and head. (an Rokinon 16mm/f2 is less). Here is his InstaGram page - Login ? Instagram

When compared to film - looking for the break even point ....
  • Color film - $570 / $15 roll (per sky object) = 38 sky objects with color film

  • B&W film - $570 / $30 roll (remember you need RGB color frames) = 19 sky objects with B&W film (doing your own development and buying a scanner)

_______________________________________

If this is going to be an ongoing interest of your, digital is the way to go, which is going to require some up front capital costs. This also pre-supposes that you use free post processing utilities, like GIMP, etc.

Take a look at this area here on the Forum -- https://www.pentaxforums.com/forums/groups/135-astrophotography/

One of the favorite bodies for deep space objects is the K5 (~$150 used) on an equatorial tracker (~$500) with a 200mm to 400mm lens. [Note - the difference is with star color. If you are going to shoot deep sky objects, you are going to take many frames and stack them for the color, thus a K5 works very well (especially at ISO80. For the Milky Way over stuff, the K70 work better since you get immediate star color and really only need to shoot a 70 second sky frame using the O-GPS1 for tracking. Just my opinion]

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Forum: General Photography 12-17-2020, 12:40 AM  
The Effect of Shutter Speed on the Appearance of Flowing Water
Posted By interested_observer
Replies: 16
Views: 1,751
I came across this and found it very interesting. The Effect of Shutter Speed on the Appearance of Flowing Water. Swipe your mouse slowly across the images to see the effects of shutter speed.
:cool:
Forum: General Photography 12-16-2020, 01:43 PM  
Understanding ProRAW format
Posted By interested_observer
Replies: 16
Views: 750
For what's it's worth, here is somewhat of a comparison to a larger sensor dslr, plus some post-processing.
















You Tube




:cool:
Forum: General Photography 12-16-2020, 05:48 AM  
Understanding ProRAW format
Posted By interested_observer
Replies: 16
Views: 750
An overview of Apple's new ProRAW format than essentially an open standard that extends DNG.
:cool:
Forum: Pentax SLR Lens Discussion 12-13-2020, 02:12 PM  
Radioactive Lenses - Super Takumar 50mm f1.4 - and other Radioactive Household Items.
Posted By interested_observer
Replies: 11
Views: 600
Not my video, but I found it interesting...
















You Tube




:cool:
Forum: Troubleshooting and Beginner Help 12-11-2020, 08:15 PM  
Unexpected result of using a zoom lens
Posted By interested_observer
Replies: 34
Views: 1,688
Evening Jim, I'm out here in the Arizona Territory with a couple of suggestions. Rather than going with an ultra wide, I would suggest using the lens that you have and shooting stitched panoramas. All you have to do is to overlap you shots by a third (and shooting handheld is just fine), and then on your PC drag them into Microsoft ICE (free download) and the utility will stitch them into a single resulting image. Rather than have an ultra wide lens try to shoehorn the view into a single image, by stitching you are actually adding resolution and sharpness.

:cool:
Forum: Pentax SLR Lens Discussion 12-11-2020, 07:47 PM  
Vintage lenses on my dslr
Posted By interested_observer
Replies: 19
Views: 995
Here is an hour long video tutorial on the Ks2















You Tube




:cool:
Forum: Pentax KP 12-02-2020, 01:58 PM  
question from potential new KP owner
Posted By interested_observer
Replies: 11
Views: 716
I have a K5iis and a K1. I was out night shooting almost 2 years ago now with a friend who has a K70. The K70 was his first dslr moving up from a smartphone. He had read the manual 3 times and played around with the camera quite a bit. Anyway, we were out shooting and talking about something or other. We were shooting in "B"ulb mode (and astro was not enabled) and he dials in 3 minutes - I was jaw dropping astonished. Went over to my K1 and did the same thing. Wow, was I very pleasantly surprised.

Nothing about it in the K1 manual, but it's in the K70 manual. Must have been added to the K1 in a software update (I see it was Firmware update v1.40), which was very nice. I would suspect that it also is in the KP, too (page 49 in the table note 4 and on page 51 of the manual). The camera has a fully functioned built in intervalometer capability.The ability to go beyond 30 seconds in Bulb has been something that I have wanted for a long time. You can just dial it up to a 20 minute exposure. I've used it a lot at 3, 4, 5 and 6 minutes. It's just really really nice to have it automagically built in - just drop dead stupid simple and easy.

Also, yes you can set up the remote to trigger both the open and then the close. On or the wired remote, just slide the trigger button up and it will hold it down for you. There are lots of ways to make this work.

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Forum: Pentax Medium Format 12-01-2020, 11:57 PM  
645 Panorama recommendations.
Posted By interested_observer
Replies: 36
Views: 1,602
Various stitching utilities will have different capabilities. PTgui (the pro version is the most capable which runs about $300) is probably the most sophisticated and capable package available. By using the point of view - the ability to move the point of view around, you can solve most of these problems. Also, by using a graphics card, you can pretty much get a real time response through the user interface.

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Forum: Pentax Medium Format 11-30-2020, 02:55 PM  
645 Panorama recommendations.
Posted By interested_observer
Replies: 36
Views: 1,602
I've done a LOT of panos, and about 15 years ago, picked up a Nodal Ninja with a rotor base. I've been using it for Milky Way panos and it has worked very well, but in the dark I've always worried about crashing and burning things. So, I've gone to another stacking arrangement. A leveling base, my rotor, a Arca-Swiss clamp and then an elevation-tilt head. Then I see that this was written up here.... (just scroll down about half way to see the setup).Yes, I love the rotor - especially during night shooting. I've used this new setup (of repurposed stuff) and it works really well. After getting it together, I noted that the elevation head I used would not re-orient (only permitted a side to side roll), so with a nodal rail and another clamp - that solved the re-orientation problem.

This rotor setup in my opinion does beat a ball head. By separating the 3D controls, it provides a wider array of adjustments. I also tried a geared head, which worked well (with the NN on top of it), but the leveling base really makes thing much easier.

:cool:
Forum: Welcomes and Introductions 11-29-2020, 01:15 PM  
newbe
Posted By interested_observer
Replies: 16
Views: 507
There is a pretty good youtube tutorial on the Pentax K-s2 (predecessor to the K70), but the menu system is pretty much the same. The KP has an all metal body, its rear screen does not fully articulate, and it uses the image processor chip from the K1, but also has the acceleration chip from the K1mkII. It's an hour and goes through pretty much everything.
















You Tube




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Forum: Pentax Medium Format 11-29-2020, 12:09 PM  
645 Panorama recommendations.
Posted By interested_observer
Replies: 36
Views: 1,602
Any lens will do. The wider the lens the more important foreground to anchor the image. You can go as wide or as long as you want. Just overlap by about a third to a quarter of a frame. The stitching software is so good these days, that lenses do not matter given a reasonable amount of overlap. 10 to 20% is usually the minimum.

I'm taking that you are asking about an L Bracket. An L Bracket is not necessary, since all 645 bodies have two tripod mount points - one on the side and one on the bottom. What you need is at least one flat plate that matches the clamp on your tripod head - two plates would be better if you didn't want to just move one around.



Any software supporting stitching is fine. Microsoft ICE is good and free. ICE takes DNG as raw file along with TIFF so that you can preserve all of your details. The new versions of lightroom supports stitching (and HDR if you do any bracketing).Also take a look at this youtube channel. The gentleman is a Scot down in New Zealand doing fine art large format commercial photography, and essentially does panos 90% of the time with his 645Z. He prints very large - 5 feet along the long side. He uses a number of lenses, but most are not wide angle - since he wants the greatest amount of detail and the sensor is large to begin with. Usually shoots 2 or 3 frames. He does not talk you through the steps. He is more interested in the time of day, sun angles, sky color, sea state, etc. and most of all, going out and enjoying yourself by having fun. But you can watch and see exactly what he does, and he just moves the camera on his tripod. He does use a nodal rail, but that's not even that necessary (if you use somewhat longer - normal lenses).

He also likes to shoot long exposures to smooth out the seas, into a nice and flat smooth and soothing image.
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Forum: Pentax SLR Lens Discussion 11-28-2020, 07:28 PM  
Super Takumar 300MM F/4 Review - Is Bigger Better?
Posted By interested_observer
Replies: 9
Views: 466
Well, there is a story behind all of this. 3 years ago, just after retiring, the oleanders looked terrible. Sure, you could get folks to blow the leaves out, and hack them back, but that was not what my wife wanted. So, over the winter of 2 years, we (as in my wife and I) raked everything out, trimmed (pruned) them from about 25 feet down to 5 feet, hacked (sawed) out all the dead wood from the interior of the plants, and stacked everything up. We went through several 40 cubic yard dump containers (the large construction ones). The weigh bills from the dump came in at 6 tons each. That was about 40 years of accumulated growth.

The first year they ended up looking terrible, but started to grow back from the base with water and fertilizer. Last year, we finished up with all the minor areas of the oleanders that needed some additional pruning, deep watering and more fertilizer. Now, they look great at about 10' tall.

We had neighbors come by while we were out working. Just get some yard guys, they would advise. You can't hire folks to do this - the right way. They just take a chain saw on a pole and trim a flat face along the property line and that's it. All you wind up with is a wall of dead wood in the interior. So, now we have folks stopping by asking who we found to do this, they can't find anyone to do it. It was either do it now or never. We see that several neighbors have essentially done what we did - did it themselves. I'm now 70, and it should be good for another 20 or so years. Raking out the leaves is nothing but time consuming, which is OK. I was just not up to doing it after eating turkey left overs yesterday.

The trouble is - my wife cares. Last year, we also "scraped" the entire acre, and laid down some pre-emergent which worked way beyond all expectations (since we scraped everything down). The pre-emergent is now going to go down each year. So, we have made everything 100x easier now. Next year we might have new rock hauled in - 200 tons to cover the areas. That I will have guys come in to do. There is no way I'm gonna spread gravel, that's too much back breaking work. Too old for that.

We've been looking (for 4 years now) for a place to downsize to, since our sons are now gone - smaller house, smaller lot, smaller everything. We can't find anything that is even close to what we like. All of our neighbors are in the same boat - they can't find anything either, so were pretty much all staying. As soon as someone sells, "PacMan" the Dozer comes and scrapes the house and then a new much larger one sprouts up. So, we are kind of stuck - but in a nice way.

:cool:

---------- Post added 11-28-20 at 07:36 PM ----------


I'm working on it... My wife keeps having other ideas. Something about "working for her" now. Just into year 5 now and starting to perfect the process.

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Forum: Pentax SLR Lens Discussion 11-28-2020, 02:15 PM  
Super Takumar 300MM F/4 Review - Is Bigger Better?
Posted By interested_observer
Replies: 9
Views: 466
Well, it's pretty simple. Since retiring, I've come to embrace the phrase - do not do now, what you can put off till tomorrow. Or simply put in Spanish - Mañana.

I should really either move my desk top system up to here, so I can post process a whole bunch of images. Or, I should go out and rake the oleanders leaves out (but I have 900 linear feet of bushes to rake). But, right at this moment - after having lunch of Thanksgiving left overs - I really do not feel like doing really anything. So, I was surfing the web and came across a few lens video, that I posted - so, I wouldn't feel too bad about slipping into a slight food induced comatose state.

:cool:
Forum: Pentax SLR Lens Discussion 11-28-2020, 01:49 PM  
Penax SMC Takumar 20mm F/4.5 - Best WIDE ANGLE Vintage LENS
Posted By interested_observer
Replies: 2
Views: 593
Not my video - but I came across it and enjoyed it....
















You Tube




:cool:
Forum: Pentax SLR Lens Discussion 11-28-2020, 01:17 PM  
Super Takumar 300MM F/4 Review - Is Bigger Better?
Posted By interested_observer
Replies: 9
Views: 466
I came across this video - it's not mine.... but, I enjoyed the video
















You Tube




:cool:
Forum: Pentax SLR Lens Discussion 11-28-2020, 01:06 PM  
Takumar 200mm f3.5 - an 18 bladed bokeh monster - review and photos
Posted By interested_observer
Replies: 6
Views: 508
I came across this video - It's not my video.
















You Tube




:cool:
Forum: Pentax DSLR Discussion 11-28-2020, 12:08 PM  
Probably the best example of Pentax Pixel Shifting with the K1
Posted By interested_observer
Replies: 14
Views: 1,131
I saw your comment and went back to re-read the article a couple of times. The way I read it, was that he had used focus stacking in the past, but really did not indicate if he was using it with pixel shifting. Even going back and parsing the sentences again - I'm not really thinking he is combining the two capabilities together. I just took the reference to focus stacking in a historical reference in terms of how he made it to pixel shifting. But, I may be wrong. Anyway, since he only had a single reference to focus stacking - and the article is mainly about pixel shift post processing, I really do think that he is using pixel shift stand alone.

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Forum: Pentax DSLR Discussion 11-27-2020, 10:41 AM  
Probably the best example of Pentax Pixel Shifting with the K1
Posted By interested_observer
Replies: 14
Views: 1,131
Several years ago, I happened across a website from a professional photographer up in Seattle that had the absolute best (well, in my opinion) illustrations of Pixel Shift images that I have ever come across. It was a discussion of both Pixel Shifting and the use of various post processing utilities.

In the discussion, he has some wonderful illustrative example images using the internal mechanisms of watches. These examples - especially in the selection of the subject matter, goes to the heart of displaying what a rather simple 4 image approach that Pentax uses, is capable of, as in some real enhancement of the basic image, particularly in terms of the details brought out for viewing. His use of the "swiping" between two images is very effective in highlighting the fine differences.

For whatever reason, I see that he has taken down the page - which is a real loss to the community. However, the Internet usually does not forget - as there is the WayBack Machine.I do wish that Pentax would advertise, highlight or otherwise engage a photographer to put together another similar presentation - or better yet, contact this gentleman. His work and subject matter, fits the application of PS perfectly. This is one of the most effective presentations of Pixel Shift technology I have ever seen.

.... and no - I have absolutely no connection with this photographer.

:cool:
Forum: Pentax SLR Lens Discussion 11-27-2020, 12:13 AM  
Takumar 50mm f1.4 is one of the very best vintage lenses. Here's a review of the four
Posted By interested_observer
Replies: 7
Views: 804















You Tube




:cool:
Forum: Photographic Industry and Professionals 11-26-2020, 04:35 PM  
Now that the competitor has pixel shift
Posted By interested_observer
Replies: 28
Views: 1,422
Sony (on their A7RIV I think) has the 16 image pixel shift also. The problem is identifying the 16 images to use, especially if you do several PS images in a row, their overall size, along with how to handle them.

I seem to remember that some one did a youtube video on if you could tell from the results (yes, you can), and then someone else did another video on handling the Sony file set (just a lot of work and file handling). The Pentax approach is pretty much spot on.

:cool:
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