Luminous Landscape Forum

Equipment & Techniques => Medium Format / Film / Digital Backs – and Large Sensor Photography => Topic started by: Mike Sellers on October 10, 2011, 10:03:05 pm

Title: Sinar e-Spirit 65
Post by: Mike Sellers on October 10, 2011, 10:03:05 pm

What would cause a vertical line on the image? Would it be expensive to fix?
Mike

Title: Re: Sinar e-Spirit 65
Post by: Graham Mitchell on October 11, 2011, 02:04:37 am

Did you happen to buy one recently on ebay? A friend of mine bought recently one and returned it due to the defective row of pixels.

Title: Re: Sinar e-Spirit 65
Post by: dergiman on October 11, 2011, 02:38:31 am

If the whole line is dead you can either replace the sensor or you can maybe have the pixels remapped by Sinar but then you end up with a "step" in the image.

Title: Re: Sinar e-Spirit 65
Post by: Mike Sellers on October 11, 2011, 06:21:42 am

It is on ebay now. A new sensor would be expensive. Guess I will forget it.

Title: Re: Sinar e-Spirit 65
Post by: ondebanks on October 11, 2011, 07:06:48 am

Ah, so you're also watching that one on ebay with the bad column. Tempting at the €2.6k price, isn't it?

I'd certainly consider it for scientific shooting, where you can convert the channels to FITS format, and either interpolate, or shift-and-add with a BPM, to work around the bad column issue.

But for regular photography, I dunno. The corrective workflow might be a PITA. I'm not aware of RAW converters which can automatically handle that sort of problem; maybe RawTherapee can, since it's particularly good on properly calibrating images.

Ray

Title: Re: Sinar e-Spirit 65
Post by: Dustbak on October 11, 2011, 07:46:50 am

I have seen this with various HB backs. It is in most cases a column error and can be fixed in most cases. I have had it with my CF39. Normally fixing this is not extremely expensive, in the 500USD range. If you are unlucky, as I was, it means a broken control board. That one cost me 3K USD.

After fixing it, you will not see a 'step' in your image. It is not visible.

Title: Re: Sinar e-Spirit 65
Post by: Mike Sellers on October 17, 2011, 09:47:57 am

I contacted Sinar and was told that the back won`t work on my Contax 645 anyway. Here is what they said "Unfortunately it is not possible to mount Sinarback eSprit65LV on Contax 645. eSprit65LV supports Sinar Hy6, Mamiya 645AFD, Hasselblad H and Hasselblad V.

 I took a  look at the offer in ebay and I guess, that the owner of this digital back refers to an effect, that might be visible.
This effect can be removed by using Sinar eXposure for downlaoding the images."

Title: Re: Sinar e-Spirit 65
Post by: edwinb on October 20, 2011, 03:20:02 pm

from my experience this would tend to the £2k+ cost to fix
you could maybe mask it by taking a lens reference before every shot
ok on a repro stand for digitisation at a stretch maybe but very doubtful for the active mobile applications this cameraback was designed for
edwin