Search found 318 matches
- Thu Apr 11, 2024 11:05 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: rotating worms
- Replies: 4
- Views: 463
Re: rotating worms
As a slight aside, the way I fix this is most raw processing software now has spot removal tools. So i choose one image in the stack, add spot removal to all the dust spots, then copy and apply it to all images in the stack. Then I flip through and readjust the spots where needed to aligning the spo...
- Wed Oct 05, 2022 3:49 am
- Forum: Equipment Discussions
- Topic: EF 100mm and RF 100mm comparison
- Replies: 1
- Views: 693
EF 100mm and RF 100mm comparison
I did a comparison of the EF100mm 2.8L and RF100mm 2.8 macro lenses a few months ago, and realized I never posted it it here. The test was a slanted edge MTF using mftmapper and a sharpened and blackened razor blade at 1x and 1.4x magnifications. More details HERE with a larger chart. rf100_v_ef100_...
- Mon Oct 03, 2022 8:36 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Quirks of Canon R7 full electronic shutter
- Replies: 7
- Views: 3462
Re: Quirks of Canon R7 full electronic shutter
I have gone through this whole process with my m6 mkII before. As stated, 1/10sec manually syncing the flash is pretty stable. I found that I could decrease that to nearly 1/20 of a second by dramatically increasing the wait time between exposures and turning off various display options. I suspect w...
- Mon Jun 15, 2020 5:25 pm
- Forum: General Discussion Forum and Community Announcements
- Topic: Scheduled upgrade of the forum software
- Replies: 10
- Views: 6954
Re: Scheduled upgrade of the forum software
Phrased more bluntly, it's to avoid "disaster by obsolescence". (Shock of the day: Google finds no prior use of that phrase!) Better buy that domain then, sit on it for 5 years, then sell it to a person who wrote a book about "disaster by obsolescence" claiming to have invented the phrase :lol: The...
- Thu May 21, 2020 3:01 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Affinity Photo
- Replies: 6
- Views: 4889
Hello Steven, I use it for general retouching and raster editing these days. All the functionality that I tend to use is there. could please give me some examples of the retouching? Any special feature better than appropriate one in the PS or GIMP ? BR, ADi For cloning, healing, and inpainting all ...
- Fri May 08, 2020 7:39 am
- Forum: Technical and Studio Photography -- Macro and Close-up
- Topic: Water drops on hydrophobic mold surface
- Replies: 3
- Views: 2775
Re: Water drops on hydrophobic mold surface
Reading a little about this phenomenon, I was also surprised to learn that the water repellency is apparently due to specialized proteins, not lipids. See the discussion of "hydrophobins" at https://en.wikipedia.org/wiki/Hydrophobin . I learned something new. When I first saw the image I immediatel...
- Tue May 05, 2020 1:33 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Affinity Photo
- Replies: 6
- Views: 4889
I couple of years ago I tried on an Acer gaming laptop that worked well with Zerene Stacker. The stacking using Affinity was painfully slow. I ran a bunch of tests with it on macOS some time ago and it is pretty close to the same stack time as zerene for me. I recall that when the feature was in be...
- Fri May 01, 2020 2:33 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: DIY microscope: Lego, 3D printing, Arduinos, Raspberry Pi
- Replies: 4
- Views: 4373
Interesting project, and given the timing. Yesterday a new raspberry pi camera module was released, https://www.raspberrypi.org/products/raspberry-pi-high-quality-camera/ and product specs https://static.raspberrypi.org/files/product-briefs/Raspberry_Pi_HQ_Camera_Product_Brief.pdf From what I gather...
- Thu Apr 30, 2020 2:41 am
- Forum: Equipment Discussions
- Topic: Setup for specimens in water on a research vessel?
- Replies: 12
- Views: 3971
You might consider an Olympus which does in camera focus stacking. I don't know if Canon has this feature. p.s. Renting a camera and testing various lens would be beneficial. I have an m6 mii, and it has focus bracketing, I am pretty sure the 90d does as well. Focus bracketing on it works well IMO,...
- Mon Apr 06, 2020 3:01 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Advice please: High NA air objective with small WD
- Replies: 15
- Views: 8282
Re: Advice please: High NA air objective with small WD
I've been offered an apo, high NA, air objective designed for no cover slip, that has a tiny working distance of 1.3mm. This objective has a wide front end that will make it nearly impossible to shine reflected light onto the subject. I dont have any comments on on an axial solution, but I have use...
- Mon Apr 06, 2020 3:29 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Zerene Stacker now has dust & hot-pixel removal
- Replies: 52
- Views: 24565
Stephen, according to my re-count just now, you are #13 on the NaNEncountered list. I started to send you the award for "Unlucky Number on an Unlucky List", but alas, it turned out that the award had been severely damaged in storage due to an unfortunate sequence of events far too long to recount h...
- Sun Apr 05, 2020 7:19 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Zerene Stacker now has dust & hot-pixel removal
- Replies: 52
- Views: 24565
When posting last night I complete forgot that I received an error during the stack. I forgot about it because the stack appeared to finish and there was quite a bit of time between the error popping up and me writing the post :roll: The error is of course some what important. 3677.136: Alignment fa...
- Sun Apr 05, 2020 2:56 am
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Zerene Stacker now has dust & hot-pixel removal
- Replies: 52
- Views: 24565
I redid the stack I posted earlier in this thread with out rotation enabled after Rik's comment and there was some pretty bad streaking on the border, and some of the streaking crept into the "usable" parts of the image, compared to with rotation on. The streaking entering the detailed area is from ...
- Mon Mar 30, 2020 8:29 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Zerene Stacker now has dust & hot-pixel removal
- Replies: 52
- Views: 24565
BTW, I notice in your example that you're getting a significant amount of rotation, judging from the angle of the edge streaks themselves, at lower right. If your rig prevents rotation mechanically, as most high mag setups do, then you should remove the checkmark on Rotate. If this is also high mag...
- Mon Mar 30, 2020 6:05 pm
- Forum: Macro and Micro Technique and Technical Discussions
- Topic: Zerene Stacker now has dust & hot-pixel removal
- Replies: 52
- Views: 24565
I just ran a deep stack as a test, and the alignment is slightly different between the one with with and without the dust mask. It was a very deep stack(600 images) with a slight misalignment of the stacking axis, as seen by the streaks. http://www.photomacrography.net/forum/userpix/1945_dusty_1.jpg...