** Weekly Sigma Photos Thread 15 April - 21 April 2024 **

[Peter has left]

I don't own the 24-105mm lens, but according to tests it is sharp in the corners only up to 50mm:

https://www.the-digital-picture.com...meraComp=453&SampleComp=0&FLIComp=0&APIComp=0

Sandy honestly, I would rather have a 24-35mm lens, combined with a 50mm Art and 70mm Macro Art.

Or a lighter combination of 24-35mm, 70mm macro Art and 105mm macro OS EX.

Peter

 

[xpatUSA]

I don't own the 24-105mm lens, but according to tests it is sharp in the corners only up to 50mm:

https://www.the-digital-picture.com...meraComp=453&SampleComp=0&FLIComp=0&APIComp=0

Sandy, Peter, it doesn't look good at any setting here (on a Canon 1DS Mk III):

https://www.imaging-resource.com/lenses/sigma/24-105mm-f4-dg-os-hsm-a/blur/canon-1ds-mkiii/

 

[Peter has left]

I don't own the 24-105mm lens, but according to tests it is sharp in the corners only up to 50mm:

https://www.the-digital-picture.com...meraComp=453&SampleComp=0&FLIComp=0&APIComp=0

Ted wrote:

Sandy, Peter, it doesn't look good at any setting here (on a Canon 1DS Mk III):

https://www.imaging-resource.com/lenses/sigma/24-105mm-f4-dg-os-hsm-a/blur/canon-1ds-mkiii/

Yes, the difference is huge,

look at the 50mm Art:

https://www.imaging-resource.com/lenses/sigma/50mm-f1.4-dg-hsm-a/blur/canon-1ds-mark-iii/

and the 105mm macro OS EX:

https://www.imaging-resource.com/lenses/sigma/105mm-f2.8-ex-dg-os-hsm-macro/blur/canon-7d/

I use 14-24mm Art, 18-35mm Art (it is smaller and lighter than the original 24-35mm and equally sharp from 24 to 35), 50mm Art and 70mm macro Art.. this range is enough for me (as a full frame it is from 21mm to 105mm).

Peter

 

[Scottelly]

- love the look of those two - along with the applied grain, very filmic.

I gave up on M42 lenses on the sd Quattro as they all produced a green band down the side of the frame - you don't seem to have this problem. Is this the only M42 lens you're using, or you also have others that don't produce the dreaded green band? My M42 adaptor is silver, maybe that's the problem.

I doubt your adapter is the problem. My Takumar makes a pretty strong, uneven green tint on my photos, when it's mounted on my SD Quattro H, but my Helios 58mm f2 does not do that. Some m42 lenses don't cause the green tint.

--
Scott Barton Kennelly

Big Print Photos - Photography by Scott Barton Kennelly

Landscape and nature photography, photographic prints by Scott Barton Kennelly, an Australian photographer living in south Florida.

www.bigprintphotos.com

Sigma Photo Pro – The Sigma Photo Pro Raw Processor Resource

https://www.sigmacamerapro.com

 

[rick decker]

--












It is a tough job living in Hawaii but somebody has to do it.
---

Light Reflection - The Photography Of Rick Decker

http://www.rickswavepics.com

 

[xpatUSA]

This is what I see every day from the window of our house. Now I enjoy watching through my SD Quattro. I like its vivid colors.



Peter

Wow Peter! There are so many colors of trees out there! I see a purple one in the distance, and there are those dark green ones up near the horizon, but most look to be light green or even almost yellow. I like that dark red one in the bottom right of that photo.

Just for grins ... colors only ... 18MB's worth:

View original + to see the remarkable variety ...

 

[Peter has left]

Night and day rhythm of life in Las Vegas! Nice colors and contrast from your fp, Rick.

Thanks for sharing..

 

[Peter has left]

Sandy, Ted and Scott, thank you for your tact with my heavily colored photograph. However, the standard color setting is completely sufficient, the image is natural, the colors are well saturated... there is no need to sharpen, the drawing in details comes out better than in Vivid mode.

 

[Tom Schum]

Seen yesterday in Alexandria VA, across the street from the Torpedo Factory. I think it is clothing store.

fp L with Tiffen Nude/FX 3 filter (brown cast).



View attachment 2fae0ffca9a24876950bdd602a939035.jpg
17.6mb download, 9520 x 6328, Lens is Kipon Iberit 75mm F2.4 at about F8.



--
Tom Schum
"Beware of taking advice from anonymous wise men." Quote from Anon.

 

[Peter has left]

Nice coloring with that filter Tom, I like it.

Peter

 

[Tom Schum]

Nice coloring with that filter Tom, I like it.

Peter

Thanks!

It's tricky to do the postprocessing though.

 

[Peter has left]

Tom, where did you buy the filter and what diameter/price?

 

[Tom Schum]

Tom, where did you buy the filter and what diameter/price?

Bought at B&H last year.

Diameter is 49mm. Diameter selection is small so an adapter might be needed for your lenses.

I tried all three: Nude/FX, Nude/FX 2, and Nude/FX 3. I looked in B&H and they have them only for their series 9 filter holders at very high prices.

I believe I spent less than $25 each for mine. The Nude/FX 3 was special order, and I had to wait a couple months for it. Maybe you can call B&H about availability.

Oops, found my order and here is a link (special order, price is $16.07):

Tiffen 49mm Nude/FX 3 Filter 49NUDEFX3 B&H Photo Video (bhphotovideo.com)

The intensity of the effect is related to the number at the end of the name. The Nude/FX 3 is more intense than the Nude/FX 2. My fp L will do auto white balance with the Nude/FX 3 and the others but I'm not sure it can do it with a Nude/FX 4 (assuming these exist).

If you use a fixed white balance such as daylight, the effect is more easily seen in the images. If you use an auto white balance, the camera tries to compensate for the effect of the filter, and this can be artistic as well.

There are a number of tinted filters available at B&H so if you can't find the Nude/FX types all hope is not lost. It's interesting to experiment and you might end up with something much better.

 

[Peter has left]

I wrote to TIFFEN (USA?) and they sent me a price for a filter with a diameter of 77 mm:
77NUDEFX3 = $124.99 before shipping and tax
I asked them for the total price (but it will probably be high) to my email.

Yes, with daylight settings, the filter can be used well. I think right now is a good time to use this filter (see my photo above) when spring is too green.

Thanks, Tom.

 

[Tom Schum]

I wrote to TIFFEN (USA?) and they sent me a price for a filter with a diameter of 77 mm:
77NUDEFX3 = $124.99 before shipping and tax
I asked them for the total price (but it will probably be high) to my email.

Yes, with daylight settings, the filter can be used well. I think right now is a good time to use this filter (see my photo above) when spring is too green.

Thanks, Tom.

Beautiful shot! Yes, lots of green there.

My thinking was to put a brown cast on the image, and then let the camera auto white balance on it. Just an experiment but it resulted in more manual work at the processing end.

The alternative is to set fixed white balance, then the filter effect is dealt with in post processing, manually.

The goal is to improve the color differentiation in the brown-yellow range. Maybe my goal could be met in a better way with a different color filter. Manual adjustments in post might then yield more color differentiation in the brown-yellow range. The filter might be blue or a combo of blue and red, or something.

There is some good theory that would make this simpler, I think. I just do not know what it might be.

 

[xpatUSA]

<>
The goal is to improve the color differentiation in the brown-yellow range. Maybe my goal could be met in a better way with a different color filter. Manual adjustments in post might then yield more color differentiation in the brown-yellow range. The filter might be blue or a combo of blue and red, or something.

There is some good theory that would make this simpler, I think. I just do not know what it might be.

Haven't tried it but, in the GIMP, an image can be decomposed into Hue, Saturation and Vightness. The Hue component layer is in grayscale and it's histogram could be messed with to "stretch" the brown-yellow range i.e. levels ... followed by recomposing.

Off to play ...

 

[xpatUSA]

<>

The goal is to improve the color differentiation in the brown-yellow range. Maybe my goal could be met in a better way with a different color filter. Manual adjustments in post might then yield more color differentiation in the brown-yellow range. The filter might be blue or a combo of blue and red, or something.

There is some good theory that would make this simpler, I think. I just do not know what it might be.

Haven't tried it but, in the GIMP, an image can be decomposed into Hue, Saturation and Vightness. The Hue component layer is in grayscale and it's histogram could be messed with to "stretch" the brown-yellow range i.e. levels ... followed by recomposing.

Off to play ...

A quick try with an amazing result:

Used 'Curves' to increase the grayscale "contrast" at the bottom end, nothing else and then re-composed. 'Levels' might have worked better - mebbe.

A whole new world of color manipulation has just opened up, eh?