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Forum: Mini-Challenges, Games, and Photo Stories 2 Days Ago  
Thematic Spiders
Posted By rgknief60
Replies: 1,065
Views: 87,760
Thanks Walter!
Forum: Mini-Challenges, Games, and Photo Stories 2 Days Ago  
Thematic Spiders
Posted By rgknief60
Replies: 1,065
Views: 87,760
Found this spider (Wolf Spider?) upside down with legs curled, in typical dead spider pose. Did 500 image stack with Zerene after discards. A couple days later, the arachnid was gone. Upon review of the stack there were a pair of the legs that moved ever so slightly--once. Perhaps recovery from a partial paralysis delivered by a wasp, or a zombie parasite?

Slightly over 1.5x with Lawoa 100mm dreamer. Second image is actual pixel crop. It would appear that the "brushes" on the ends of the legs would allow for stealthy, low vibration walking or running. Posted earler to Macro.



Wolf Spider?


Wolf Spider? Actual Pixels
Forum: Pentax DSLR Discussion 4 Days Ago  
K10/20D Forum
Posted By rgknief60
Replies: 13
Views: 538
This is a three image panorama taken in 2010. Final image size is 33MP. One can now take the same image with one click of the K-1.


20100721 - South Dakota Badlands
Forum: Pentax DSLR Discussion 4 Days Ago  
K10/20D Forum
Posted By rgknief60
Replies: 13
Views: 538
Thanks for starting the thread!




I do like that blue for the sky sometimes!




I rarely use mine anymore, but since it was my first DSLR, you could say that my heart is still with the K20D. :)
Forum: Pentax Price Watch 11-26-2022, 01:51 AM  
Samyang 20% off Black Friday Sale includes Samyang 135mm f2.0 for $360.00
Posted By rgknief60
Replies: 2
Views: 243
If you are an astrophotographer, or just looking for a deal on Samyang lenses, this might be of interest.

Samyangus.com is selling their Samyang 135mm f2.0 Pentax mount lens for a Black Friday special of $360.00. Choose Pentax mount, add to cart, price shows up at checkout.

It also appears that many other, if not all Pentax mount lenses are 20% off as well.
Forum: Pentax Price Watch 11-26-2022, 01:36 AM  
Samyang 135mm f/2.0 ED UMC Telephoto Lens for $325.09 at Amazon
Posted By rgknief60
Replies: 3
Views: 393
It is now $390.50 on Amazon. For the Friday sale, it is less expensive on samyangus.com: $360.00 at checkout for Pentax mount.
Forum: Pentax Price Watch 11-15-2022, 01:13 PM  
Mitakon Zhongyi 20mm f/2 Super Macro - $99
Posted By rgknief60
Replies: 0
Views: 280
The Mitakon Zhongyi 20mm f/2 Super Macro is currently available at Adorama for $99.00. It is 4-4.5x magnification.

If you wnat to get into high magnification for a song, this is the ticket. I've not seen this lens at this low price before now. It was my go to lens for high magnification before I purchased the Laowa 2.5-5x for 4 times the price.

It is a manual lens, with aperture at the front of the lens. For maximum sharpness, you leave it wide open. There is no focus; you move the lens forward and backward to achieve focus.

The image below is a focus stack taken with my old rack & pinion macro rail and constant light source. If I were to take it with my current NiSi macro rail it would be much sharper, as the NiSi allows for more precision in step size.




Monarch Antenna with Wing Backtound by Roger Knief
Forum: Lens Clubs 11-13-2022, 06:07 PM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
Very nice image, Peter. Wow.

I reviewed the images again, and it was handheld...sort of. I was resting the lens on the viewing platform rail for the shot I posted. Not as steady as a tripod, but somewhat better than handheld. I shot some images of the same pair from a closer location with no support, and they turned out much worse.

I posted a lot of images on the drive for which I did not expect much detail, hoping that someone would see some pattern. You confirm what I thought, that they are soft. As the day progressed, the cranes moved further away, so most of the images I took became "record" shots. The resting pair of cranes were probably the closest subject I photographed.

Thanks for the advice on the shutter speed. I posted one image of a hummer here a while back, also taken with the 33, at minimum focus distance without converter. I thought it was just OOF due to shallow DOF, but shutter speed may have been a major issue. It was mostly soft until I ran it through Denoise-AI. It was low light at 1/250. So shutter speed may be a major component to my problem.

Thanks again for the feedback, and kind words about the macros on flickr.

Roger

---------- Post added 11-13-22 at 07:10 PM ----------



Thanks a lot for the ID!
Forum: Lens Clubs 11-13-2022, 05:21 PM  
300mm plus Lens Club: discuss your long lenses
Posted By rgknief60
Replies: 39,012
Views: 4,121,736
Thanks a lot!
Forum: Lens Clubs 11-13-2022, 03:51 PM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
I have not done the fine adjustment. I think that is next. I just finished looking through the last three months of 300 plus, and note that the combination is used quite a bit. That is reall nice detail on the frogmouth and chick.

The first image below is the only other thing I shot besides cranes on the outing with the 33, 1.4 & 150-450. I shot it from the same location as most of the images, did not move the tripod. What is below is a cross post from 300+.
________________

This is what happens when one takes a break from the main subject, and turns around. I think this is a junenile. This individual was cracking acorns. In the second photo you can see a small piece of the acorn flying off to the right. It appears that the top of the snag is storage for acorns as well. Could someone help with an ID?


Thanks GvilleRick!

The first image is taken with the K33, HD 1.4x, and 150-450. It is cropped to 4000x3000 for comparison with the Q7. The second and third imamges are taken with the Q7, IR remote, Pentax Adapter, and DA 300mm. Manual focus with the 300mm is a challenge Since the bird returned to the snag repeatedly, I pre-focused, and hoped it would hop into focus.


Surveying its Domain by Roger Knief



Cracking an Acorn by Roger Knief



My Acorn by Roger Knief
Forum: Lens Clubs 11-13-2022, 03:38 PM  
300mm plus Lens Club: discuss your long lenses
Posted By rgknief60
Replies: 39,012
Views: 4,121,736
This is what happens when one takes a break from the main subject, and turns around. I think this is a junenile. This individual was cracking acorns. In the second photo you can see a small piece of the acorn flying off to the right. It appears that the top of the snag is storage for acorns as well. Could someone help with an ID?


Thanks GvilleRick!


The first image is taken with the K33, HD 1.4x, and 150-450. It is cropped to 4000x3000 for comparison with the Q7. The second and third imamges are taken with the Q7, IR remote, Pentax Adapter, and DA 300mm. Manual focus with the 300mm is a challenge Since the bird returned to the snag repeatedly, I pre-focused, and hoped it would hop into focus.


Surveying its Domain by Roger Knief



Cracking an Acorn by Roger Knief



My Acorn by Roger Knief
Forum: Lens Clubs 11-13-2022, 01:46 PM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
Thanks for the kind words and advice!
Forum: Lens Clubs 11-13-2022, 01:05 PM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
Sorry things don't look better, Eric.

Pixel density for brding is why I bought, and used the K-3III for this outing. Things looked okay to me on the back of the display. I wish I'd used the K3III without the teleconverter a while to see the difference. I had the K-1 with me, but only used it a couplel of times on the DA 300. There was enough action that didn't stop to change lenses. I also used the Q7 with the DA 300, but never nailed manual focus with the cranes; I did come close with a woodpecker.

Probably the next thing I'll do is check to see if the K-3III & 150-450 combination needs calibration. I just remembered that the individual from whom I purchased the 150-450 needed to calibrate it for use with his K-3. I will need to do some more testing with the K3III.

Here is a link to an old post I made in the 300+ club about the K-1, 1.4x, & DA 300mm. If you go down the page a bit you will see an actual pixel crop that I thought was acceptable with the HD 1.4x. I expected about the same level of detail using the HD 1.4x with the 150-450 on the cranes that were the same distance, maybe closer. Maybe that will muddy the waters even more... :)

While I am disappointed that I did not capture any highly detailed images, the bright side is that the K3III nailed focus faster than I could aquire moving targets. There is enough detail (if I don't pixel peep) of memorable behavior that I never saw before to provide enjoyment and fond memories of the day for years to come. It performed is far beyond the K5IIs, let alone my old K20D. I expect that things will go much better on the next outing. Life is full of learning experiences!

Any other comments or suggestions are welcome.

Roger
Forum: Lens Clubs 11-13-2022, 09:28 AM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
That could well be. Thanks for the reply.


All of my K3III images were shot on at 1000/second, as one never knew when they would get up and dance. That was a bit slow for many of the BIF images. Cranes are faster than they look.

The image above is handheld. The morning light was not real dark or bright. It was partly cloudy, and I'd guess the clouds were overhead when this was taken as I did not have to deal with highlights. All other images were taken on a tripod with shake reduction off, using the HD 1.4x.

These are big birds. I'd guess I was 50-75 feet away. The image is not cropped. I actually took the slightly cropped version down from flickr, and replaced it with the full size version, uncropped version prior to posting. Since the full size image is not working from Flickr (I cannot access yours either), here is a link to the image on my Google Drive. The images on the drive have no PP except where there is "fsiv" in the filename. There are also images not posted here.

The images below were taken in the afternoon and evening, with harsh lighting that put side of the birds facing us mostly in shadow, except for ones way in the distance. They were all taken on tripod. None are crops. The last two are heavily post processed to try and recover what little detail is in the shadow. All are maximum zoom, except the last which is minimum. If you cannot access the images full size in flickr, I think that I also placed them on the drive link above.



Incoming... by Roger Knief



Incoming - Almost There by Roger Knief



The Dance by Roger Knief


Coming in for Landing by Roger Knief



Off in the Distance by Roger Knief
Forum: Lens Clubs 11-12-2022, 09:27 PM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
Captured these last Wednesday. This was the first outing where I shot primarily with the K-3III because of its higher pixel density. I paired it with the HD 1.4x & 150-450.

Was disappointed as I never got any detail in the individual feathers, even with this relatively close shot. Am I expecting too much?

Shot most images using TAV, with shutter at 1000s & Auto ISO. I've used the converter to good effect in the past. Has anyone else had issues with this combination?

It seems to me that the K-3III is far behind the K-1 in ISO performance, and I'm wondering if I should have shot them with the K-1 and cropped out the vignetting...

Any suggestions welcome. Thanks.

F8, ISO 1000, 1000/sec.



Sandhill Cranes
Forum: Pentax SLR Lens Discussion 10-14-2022, 10:39 AM  
MF Macro Lens Recommendation?
Posted By rgknief60
Replies: 40
Views: 1,756
There is a nice buy in the marketplace on a FA 100mm macro at what I believe is a good price. I paid more than double a few years back for mine--used! I used it for years until I upgraded.

If you think you might like to go beyond 1:1, the Laowa CA-Dreamer is a great 100mm macro. Here is the beginning of a series of posts about using it for focus stacking I recently made in the macro thread. The subject is magnified a bit above 1.5x

If money is no object, a A-star or FA-star 200mm macro is the way to go. They come up rarely, but when they do, it seems there are 2 or 3 available in a short period of time. It takes a while to learn, and is mostly a tripod lens for me unless I use flash. It is heavy. Handholding a 200mm at high magnification is like handholding a long lens without support--possible for some folks, but not for a lot of mere mortals! :)
Forum: Lens Clubs 10-14-2022, 10:04 AM  
*Macro* lens club
Posted By rgknief60
Replies: 4,692
Views: 650,817
Thanks for the kind words. I did this on the NiSi NM-180. I used live view about half the time to make sure the stack was progressing properly. At 15s/image, the last one hundred got pretty tedious. I kept looking to see "are we there yet?" :)

Allan Walls has an excellent YT video on the NiSi. He has a simple paper clip "hack" that allows you to index 25 micron steps. He believes that it is possible to use the NiSi up to 10x. I have not set mine up for indexing yet. It would have been easier had I done so.
















You Tube




He also has a DIY video someone might find interesting. The info starts about 3:30.
















You Tube





---------- Post added 10-14-22 at 12:22 PM ----------



Walt, that would be fun to see--along with picture! Nudge, Nudge... :)
Forum: Lens Clubs 10-13-2022, 06:45 PM  
*Macro* lens club
Posted By rgknief60
Replies: 4,692
Views: 650,817
Here is an actual pixel crop that shows the performance of the CA-Dreamer. The image above was 500 images at 15 seconds per image and is a little bit more than 1.5x magnification. Sharpness would undoubtedly be better with diffused flash, but I am satisfied with the result.

There is only one macro rail of which I am aware that will allow one to manually produce an image ilke this: The NiSi macro rail. You can get very fine steps with it. Assembly done with Zerene, post processing in Faststone.
Forum: Lens Clubs 10-13-2022, 03:29 AM  
*Macro* lens club
Posted By rgknief60
Replies: 4,692
Views: 650,817
Found this individual upside down. Focus Stack, Laowa CA-Dreamer.
Forum: Lens Clubs 10-12-2022, 12:00 PM  
*Macro* lens club
Posted By rgknief60
Replies: 4,692
Views: 650,817
It took a long time before I got very many keepers with the 200mm. Very frustrating initially. But when everything comes together, it is great. It is like long lens photography if used handheld. My experience is like yours. I got more keepers handheld with My old (rarely used) FA 100mm f2.8 macro using AF than the 200mm. I'm almost always on a tripod with the 200mm.




My experience mirrors yours to some extent. I read that the throw was short before I got it. It is a nice lens, but would be great if it had a longer throw. Moving in and out to achieve focus is my technique most of the time. Getting enough light at 2x for focus can be a challenge sometimes. I don't have problems with the hood or caps.

This is a 6 image stack with the Laowa. Another four images were discarded as the spider changed positions slightly. The crop is actual pixels. I could not get any closer with the Laowa/Tripod combination, and was reluctant to move the container and see the spider run away. Exposure approximately 3 seconds for images in stack.


EDIT: Earlier crop was from different lens, crop from Laowa 100 now posted.
Forum: Monthly Photo Contests 10-08-2022, 02:32 PM  
The Lagoon and Trifid Nebulas
Posted By rgknief60
Replies: 17
Views: 205
I would like to nominate this photo
Forum: Monthly Photo Contests 10-08-2022, 02:29 PM  
M42 The Great Orion Nebula
Posted By rgknief60
Replies: 51
Views: 467
I would like to nominate this photo
Forum: Mini-Challenges, Games, and Photo Stories 09-30-2022, 04:49 PM  
Thematic Pollinators in action
Posted By rgknief60
Replies: 807
Views: 59,678
Last year I had monarch catepillars. This year, no monarchs, nothing. Sadness.



Wow. Have seen them a time or two, but either did not have a camera, or not fast enough to capture one. Nice job.
Forum: Digital Processing, Software, and Printing 09-03-2022, 05:36 PM  
Computational Photography (Topaz) and OOF Restoration Due to Shallow DOF
Posted By rgknief60
Replies: 1
Views: 571
This is to show what computational photography (Topaz) can do with OOF areas due to limited DOF. Originally posted to the 150-450 thread.

The first panel is the original JPG. The second is from the image posted here a few days ago. I used Denoise AI after some processing in camera raw. The last panel is further processing with Sharpen AI version 3.3.6.

It took four to five minutes to for my older i7 quad core, 32GB ram, 2GB video laptop to process and save the image with Sharpen AI. I posted the original size screen capture so you could compare actual pixels.



Topaz AI's Comparison with Original JPG by Roger 0691, on Flickr
Forum: Lens Clubs 09-02-2022, 11:39 AM  
Post your HD PENTAX-D FA 150-450mm F4.5-5.6 ED DC AW pictures!
Posted By rgknief60
Replies: 3,248
Views: 447,255
Not sure if this post belongs here... If this is not helpful, let me know, and I'll delete. This is to show what computational photography (Topaz Labs) can do with OOF areas due to limited DOF.

The first panel is the original JPG. The second is from the image posted here a few days ago. I used Denoise AI after some processing in camera raw. The last panel is further processing with Sharpen AI version 3.3.6.

It took four to five minutes to for my older i7 quad core, 32GB ram, 2GB video laptop to process and save the image with Sharpen AI. I posted the original size screen capture so you could compare actual pixels.



Topaz AI's Comparison with Original JPG by Roger 0691, on Flickr
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