Thank you. I’ll give it another try, assuming it’s still available.

lev29 👍🏼😎

Thanks for replying so quickly, topcat! By "them", are you referring to the Luminar company or the one responsible for the link you provided?

Once again, thank you.
lev29 😎

Thank you for your reply, topcat. Sorry, but I’m uncertain what you mean, based on my experience with the term trial when I looked into this matter? Specifically, does "get" mean you paid nothing for either Luminar 4 or Luminar AI indefinitely? You still retain one or both of these applications without paying now or in the near-future one red cent? 🤔

Thanks,
lev29 😊

What a fool I was; how naïve of me. I should have known better. NOTHING is free!

It took a couple of days before I actually received the e-mail to download the "free" Mac version of Luminar 4. When I took the first step with the Installer, it prompted me: Please enter email for trial activation.

"Trial" means "free for a set number of days," not actually FREE.

Well, Topcat, it’s my fault for not noticing that you employed the phrase, "it looks good, i.e. that you hadn’t actually tried it yourself.

But then subsequently, you posted, "I did also. It does seem fine. I like the sky replacement feature."

So, giving you first the benefit of the doubt (unlike many members here who historically haven’t done so,) did you not mention that this URL you posted was merely a free trial because you didn’t notice it OR because you were so satisfied with it that you know you will ultimately purchase it?
OR is it possible that since you and kpmac downloaded it actually for free, the URL leads to an altered page that only offers a free trial?

Looking forward to your reply. 😉

EXCELLENT article! Thank you for presenting it; however, I disagree with your using the qualifier "All ..." as its discussion and examples employed all pertain to color IR, i.e. portions of the visible light spectrum are acquired with the near-IR spectrum.

"All" is not just a trivial distinction, since it does not, in my opinion, even indirectly, address the subject of this Topic: Polarizing Filters For Black & White Infrared Photography

If one can tolerate viewing about two-and-a-half hours of two webinars given by George Wilson, perhaps one can glean some information that leads to a difference. No, I cannot assert that his claim that Singh-Ray's Gold'N'Blue polarizer for B&W IR photography DOES NOT make a difference, since despite my inability to discern any whatsoever (in the two examples he provided in part 2,) this could be secondary to hardware limitations in his Webinar broadcasts. His quasi-physics explanation did not satisfy me either, as his terminology was clearly "dumbed-down" for what he presumed to be an entirely lay audience.

Here are the URLs and Subjects discussed for each of these webinars:

PART 1:
https://zoom.us/rec/play/uJJ8cbr-qz43T9fBsASDBqAvW9XrKf-s1iceqfEEzEbmASQENlv1b7pGa7F4910kAdFNUU-A_oMXtvfq
A review of what is infrared and its origins
The 3 types of infrared capture
Comparison of color vs B&W Infrared photography
Infrared characteristics and how to expose for them
Focusing adjustments, direction of light, digital noise and exposure starting points
Important accessories


PART 2:
https://us02web.zoom.us/rec/play/tMV5ce-vrG43SYWSuQSDC_R8W9XoLvms2igY-PZZxUmwB3VVZgCkYrpHMetkRmP_oRBb1abLXE5dr62R?continueMode=true&_x_zm_rtaid=gUe6uz7iSj2FJ-A6wgqm6Q.1588122123951.15cbfa0e32e67124c788a20d6244f040&_x_zm_rhtaid=520
Camera conversions – pros/cons
Resin vs glass filters
How IR "reacts" with filters
Step-Up rings
Mor-Slo, Vari ND, Vari NDuo
Using an 830mm I-Ray as a 2-stop ND
Contrast w/ Gold Blue Polarizer
Softening the image w/ Soft Ray
Other useful filters

Despite my skepticism as to portions of these two webinars, I hope they can help someone, albeit belatedly.

lev29

While "your simulation program" may have rendered the vegetation appropriately, how did it do in predicting that the stripes but not the stars would "vanish"?

Spectral simulation isn't, by and large, too reliable. Your question (with the poorly-worded subject title,) reminded me of those colored gels marketed in the 1950s, the ones that people ostensibly were to apply to the front of their black & white TV screens to get "color TV".

Part 1.
Honestly, julian, who cares?

Take whatever near-Infrared simulation program you can find, twiddle all the knobs & switches you desire, and apply it to this visible light-only photo. Now MAKE SURE it's going to match how it really appears in "pure" IR, such as a photo taken with a long-pass IR filter that has its "cut off" (actually, 50% transmission point) @ 780 nm. Then go to part 2 to see what it should resemble.

Politely, I don’t know why you were under that [your former] impression either. Since humans cannot perceive UV or IR, why would there be any expectation of color?

The only explanations I can come up with are that you’ve previously been looking at post-processed images OR those that included some portion of the visible light spectrum.

My photos are SOOC (Straight Out Of the Camera). The only editing I currently do is cropping or with respect to image brightness and/or contrast.

But I do thank you for noting my post. I guess I should have added that my photos are handheld, so the ISO settings I employed are generally the minimum for walk-in around and shooting in the UV-A band.

Here’s an example of the other color that I’ve observed in my UV-A photos SOOC: Purple!
(For comparison is provided a visible light-only photograph taken within minutes of the other.)

I agree. GET THE SHOT!!

There's nothing like empiricism to justify use of a high ISO setting, which I'm obliged to use whenever I shoot UV-only photographs (i.e. ~320 - 400 nm range of wavelengths.) Here are two such photos taken at f/5.6 and ISO settings of 12,800 and 20,000, respectively. They are followed by a visible light-only photo corresponding to the sunflower seen in the first.

Just replying to your question off the cuff, and mind you that I don’t keep track of any manufacturer’s camera models (other than Sony’s, to a limited extent,) why do you necessarily attribute the IQ to the camera’s processor instead of, either in part or whole, the camera’s image sensor, metering system and/or algorithm, or some other technical improvement?

Also, for those of us who haven’t bothered learning the various model numbers of the major manufacturers, it might help to refer, in this case, to the manufacturer by name, at least once in your opening statement. I realize that it probably just slipped your mind.

😎

I realize your thoughtful question was initially delivered without consideration given to the precise meaning of "most useless," so the following is just a musing on the topic, by no means intended as any sort of attack (though, unfortunately, I’m certain there still exist UHH members who will interpret anything I post that way.)

MOST useless? You meant that there are actually degrees of uselessness?

I think not. But if you mean [just plain] USELESS, at this time it’d be the 12mm Lensbaby Fisheye optic, because I can’t find the doo-hickey that connects it to my Lensbaby Composer I & II mounts.

But perhaps instead you mean used the least [frequently]?

In that case, then my answer would be my most of my Sony A-mount lenses, as I seldom use my dSLT and IR-converted dSLR cameras these days.

I’m sorry, Wallen, but based on the manner in which you answered, it’s not clear (at least to me,) whether you actually own a T-S lens, let alone what focal length yours is. (I did not see a list of your equipment in your profile.)

I own a Rokinon 24 mm T-S full-frame lens. Discounting its comparatively increased weight and size, it is unquestionably MORE USEFUL than its "regular" 24 mm lens counterpart. It can do everything the plain one can do, and more!!

So do you actually own or have practiced with one?

Hi, Fifer!

Sorry that I can’t help you relocate your video of interest, BUT ... I just watched this 1h 19m long Webinar live a few weeks ago. Although it was sponsored by Singh-Ray, little of it pertained to the use of filters. Rather, it was mostly about composition for landscape photography and definitely discussed your current area of interest!

No More Rules! Human Perception in Compositions with Colleen Miniuk
https://www.youtube.com/watch?v=LVRHSHHMZOw&feature=youtu.be

I plan to watch it again and review at least one of its references.

Enjoy!

lev29 😎

I use Photos and I often change the order of both albums and folders by clicking and dragging! However, I can only click and drag ONE such folder/album at a time.

Roger,
Unless you just purchased a Mac laptop or desktop that contains the brand spanking new M1 chip, what’s the rush to download this new OSX?

I have been an Apple user for years. I’ve read some of Apple's promotional materials concerning this chip, the TWO laptops they’re currently releasing with this chip, and the impression I have is that the primary purpose for Big Sur OSX is to take advantage of this chip's capabilities.

lev29 😎