full spectrum cameras

[Stuart1971]

I was quite surprised at the no filter at all images, I would have expected them to have a red / pink hue to them, as my modified DSLR does.. 🤔

[powerlord]

its got a custom white balance set which sorts it out.

what I've found kinda weird is that, at least on my mac, the raws are read and processed with that white balance too, which is a bit weird - my 6d's don't do that.

[R26 oldtimer]

I've been using my full spectrum modded DSLRs both for astro imaging and infrared photography with external ir pass filters.

 

[Albir phil]

23 hours ago, michael8554 said:

"Maybe he had used the wrong terminology in the advert, "

Wot I said.

If the vendor doesn't know the difference then caveat emptor.....

Michael

Caveat emptor🤔

[Stuart1971]

3 minutes ago, Albir phil said:

Caveat emptor🤔

Means, “Let the buyer beware”

[Mandy D]

@R26 oldtimer Those are incredible images. I particularly like the second one where you feel as though you are seeing the view through the model's eyes. It really pulls you into the image and gives that feeling of being there. The colours in that tree are wonderful! You must be really pleased with the results.

[happy-kat]

I've been looking for a UV only filter interesting to see you found and used one

[powerlord]

It's a 40 quid job from China off amazon, so I'm not holding my breath for quality..but we'll see.

[powerlord]

On 05/10/2023 at 10:24, happy-kat said:

I've been looking for a UV only filter interesting to see you found and used one

So, the UV only one arrived. I have to say I have no idea what I'm doing with this as of yet. I shot the first set with the camera still white balanced for IR filter (I know it shouldn't matter with raws - but it does - as every program I use at least takes note of the 'for info' data in the raw about the white balance). The second few, white balanced in camera with the UV on. In both cases, I did minimum editing in affinity - just brightened/curve and saturation.

As I understand it ( @vlaiv might know more?), looking at example frequency responses (I dunno what the M100 has exactly), but looking at say, an imx585, below 400nm the blue pixel sensors are picking up, but off the left it looks like the green and red and maybe gonna come up again too ? so hence, I've not got monochrome UV, more a sort of false colour from the sensor pixels firing at different percentages based on the frequence of the UV maybe?

I've also attached a few raws.

this was shot with camera still white balanced for red. this was the a raw (raw very red), and then white balanced in affinity photo and saturated/curved:

this is custom white balanced on camera (against a white background), so on camera pretty much as you see - not very red in raw on on viewfinder, and again, min editing in affinity photoshop. note: much less red.. weird.

and here's a few with sky. again red one had wrong IR white balance, then tried to fix in edit. Other one, white balance on camera. Again, I always thought white balance didn't matter for raws, and maybe in the 'raw data' (sic) it doesn't...but since I don't speak raw data.. and use software to interpret it for me... that software (affinity photo, and macos natively for a start) seem to take note of white balance data recorded and apply it anyway. Anyway, that's an aside really - other than it does seem worth white balancing on the camera. How to best then edit these photos - swap channels ? map colours to other colours ? I dunno - will have to look for some tutorials. note the weird total reflection of light from my tesla windscreen here behind i8. also interesting. I see similar mirror like reflection on tail lights of neighbours mini.

raws:

IMG_1627.CR2IMG_1622.CR2IMG_1620.CR2IMG_1617.CR2

Edited October 16, 2023 by powerlord

[happy-kat]

Interesting to read your results. I'm intrigued in the UV of flowers so had been from time to time keeping a look out for a UV filter.