Too much Noise with CV 15mm f4.5 on R-D1?

[alex_g_2000]

Hello,
I recently acquired a CV 15mm f4.5 for my R-D1 and have been shooting a lot of colour pictures... with slightly disappointing results.
Almost all present too much noise, especially (or mainly) in the corners.
A friend of mine said that this noise is generated by the lack of exposure of the sensor in these areas due to the vignetting.
Does it mean that with such lens, the result will never be right?
Have any of you had this combo and achieved any good shots in colour?
Or is the solution B&W?

The attached picture is taken at f8, 1/1000, ISO 200, compressed from RAW in Capture ONE with NO NOISE Reduction.

 

[aad]

I think he's right-might work better in lower light?

 

[f16sunshine]

Keep working at it. The lens/sensor combo will vignette but, not normally this much. Try shooting a more evenly illuminated scene. The top left here is clearly being shaded. With a more even scene you will get a better understanding of the potential and limits of this kit.

 

[saxshooter]

It's not noise, it's vignetting (since the camera uses the same Sony sensor in the Nikon D100, it doesn't have a microlens array to correct for light hitting the edges of the image circle obliquely, as they do in RF lenses). If you shoot RAW it is correctable.

When I had the Epson RD-1 the 15mm Super Wide Heliar spent 90% of the time on the camera. What a great combination. I love the vignetting. You can add a bit more exposure so it doesn't seem as pronounced. But if you're shooting big skies, you'll see it.

But I always liked it myself.

 

[menos]

You should overexpose the photograph just before clipping highlights with the EPSON R-D1.
Later in post processing, you can pull out the light falloff at the edges with vignetting controls and correct exposure of the complete frame to achieve an evenly illumination.

It is an issue with both the R-D1, being not designed for such extreme ray to sensor angles in the corners and the 15mm Heliar being notorious for this issue on digital cameras.

You could use the 15 Heliar on film, which gives better illumination in the corners, respective to digital.

 

[LCT]

Vignetting indeed. More or less easy to adjust depending on the raw converter. The Epson's makes a lot of noise. Photoshop, Silkypix or Capture One are better.

 

[Ezzie]

It's not noise, it's vignetting (since the camera uses the same Sony sensor in the Nikon D100, it doesn't have a microlens array to correct for light hitting the edges of the image circle obliquely, as they do in RF lenses). If you shoot RAW it is correctable.

When I had the Epson RD-1 the 15mm Super Wide Heliar spent 90% of the time on the camera. What a great combination. I love the vignetting. You can add a bit more exposure so it doesn't seem as pronounced. But if you're shooting big skies, you'll see it.

But I always liked it myself.

Same sensor yes, but I've been led to believe that the R-D1 indeed does have a micro-lens array to compensate for edge fall-off unlike than the Nikons.