[wkraus]

Crosspost from Voigtländer LBA - post your pics, notes and thoughts:

Lower Austria, May 2009. Taken with K10D and Voigtlander Macro Apo-Lanthar 125mm F 2.5 SL at f/9.5.

[rgknief60]

Blast from the past: SMC Pentax-A 50mm F2.8 Macro on K20D. Rarely used now, but when a light setup is needed, and MF not an issue, can't be beat.

This was my first "macro" lens: light, inexpensive and sharp. Only magnifies to 0.5x, which is more than enough for most non-stacking work.

Image taken in 2011.

[rgknief60]

Lower Austria, May 2009.

Wow. I wish I could see the view in person. Thanks for posting.

[wkraus]

Wow. I wish I could see the view in person. Thanks for posting.

Thank you!

[rgknief60]

You win some and lose some. Was excited by an utterly calm evening to photograph the center of my Elsa Spaeth clematis. Took 172 image stack.

When I stacked it together, I found that a thrip infestation had utterly ruined the stack. I've had that happen with ants and butterfly weed, but I could not even see the thrips until preview. I tried stacking anyway. The thrips are all those blurry golden brown blobs. They move fairly fast, and shutter speed was 1.3-2 seconds at F8.

Solution: Use magnified liveview to watch the subject for activity prior to beginning the stack. Learn from my mistake!

---------- Post added 05-28-23 at 09:56 PM ----------

Here is a 5fps video (click through to Flickr) from the stack that illustrates the problem. Editing would be a lengthy process, and it is possible that I could never edit out all the blobs.

It has the added bonus of letting you move through the stack. Images resized and cropped by Faststone image viewer, frames to video by CS6E.



Thrips Ruin Stack by Roger 0691

[ivanvernon]

Peony and clematis macro shots with K-1 and the Kiron (Kino Precision) 105mm f 2.8 macro. I don't know what others think, but I put this lens in the same class as my Zeiss Makro-Planar ZF 100mm f 2.0 macro.

NOTE: The peony (first shot) is basically untouched by human hands, but the clematis (second shot) is a 50 percent crop.

[rgknief60]

Peony and clematis macro shots with K-1 and the Kiron

Nice. I think it's harder sometimes to get a good single-image macro than to do a stack.


In my image above, I cropped the stack to16:9. The width is the same as the stack as shot.

If you've not seen a thrip, this is the only one with a good profile that stayed still for 1.3 seconds.
Not a lot of detail as the thrip is only 72x166 pixels. Actual Pixel crop.

Attached Images

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[swip]

You win some and lose some. Was excited by an utterly calm evening to photograph the center of my Elsa Spaeth clematis. Took 172 image stack.

When I stacked it together, I found that a thrip infestation had utterly ruined the stack. I've had that happen with ants and butterfly weed, but I could not even see the thrips until preview. I tried stacking anyway. The thrips are all those blurry golden brown blobs. They move fairly fast, and shutter speed was 1.3-2 seconds at F8.

Solution: Use magnified liveview to watch the subject for activity prior to beginning the stack. Learn from my mistake!

---------- Post added 05-28-23 at 09:56 PM ----------

Here is a 5fps video (click through to Flickr) from the stack that illustrates the problem. Editing would be a lengthy process, and it is possible that I could never edit out all the blobs.

It has the added bonus of letting you move through the stack. Images resized and cropped by Faststone image viewer, frames to video by CS6E.



Thrips Ruin Stack by Roger 0691

Very cool!

[rgknief60]

Very cool!

Thankyou.

---------- Post added 06-01-23 at 10:30 PM ----------

Focus Stack Challenges: Worm Trails

If you do much stacking, you know about worm trails. They are are from hot or dead pixels. Every sensor has them. Some are worse than others

They are the bane of every image stack, especially deep ones. The severity depends on how flawed your sensor is, and the number of images stacked. It is even worse for a pixel shift stack, as the single pixel becomes four pixels.

Note the worm trails on the right OOC JPG stack. The left image is from DNGs processed in RawTherapee and exported as tifs. RT has a hot/dead pixel removal setting. As you can see, it saves a lot of post processing.


OOC vs RT - Worm Trails by Roger 0691

[onlineflyer]

Peony and clematis macro shots with K-1 and the Kiron (Kino Precision) 105mm f 2.8 macro. I don't know what others think, but I put this lens in the same class as my Zeiss Makro-Planar ZF 100mm f 2.0 macro.

NOTE: The peony (first shot) is basically untouched by human hands, but the clematis (second shot) is a 50 percent crop.

I own the Lester Dine version of this lens. I've never had the opportunity to shoot with the Zeiss Makro-Planar but I agree, the Kiron is a very special lens.

Hope all is going well with you.

[Aaron28]

K-3ii...tamron 90/2.8DI...af360fgz

[rgknief60]

K-3ii...tamron 90/2.8DI...af360fgz

Nice job of getting the parts in focus that need to be in focus. I wish I had shot them!

the Kiron (Kino Precision) 105mm f 2.8 macro.

I own the Lester Dine version of this lens.

There was a dental version in original packaging with all the parts several years back. I've always regretted not picking it up. My dentist was surprised to find out that they made a specialty macro film setup for dentists when I told her about it. The images I see taken with these lenses always render nicely. If I did not have the Lawoa 2x, and the budget were not so tight, I would probably get one.

[rgknief60]

Focus Stack Challenges: Worm Trails

From time to time I can post challenges and issues I face when stacking, and solutions I find to fix them when a solution is available. I also appreciate solutions others find.

Do you find posts like the worm trails one above helpful?

[Aaron28]

Nice job of getting the parts in focus that need to be in focus. I wish I had shot them!

thanks appreciate that!

[HoutHans]

From time to time I can post challenges and issues I face when stacking, and solutions I find to fix them when a solution is available. I also appreciate solutions others find.

Do you find posts like the worm trails one above helpful?

Yes, even when I'm not up to shooting stuff like that, I'm always eager to learn and this forum is a great place for that. Keep e'm coming, I'd say.