Calibrating a 7artisans lens for a Leica M10 using a visoflex 020

[epmul]

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Does anyone have experience using a visoflex 020 to calibrate a 50mm f1.1 7Artisans lens for the Leica M10 RF?  Using the supplied focussing chart from 7Artisans as recommended seems more involved. 

Currently, I can see a discrepancy between the focussing using the RF compared to the visoflex 020 - no calibration has been undertaken to-date.

Appreciate any advice or experiences e.g. do you recommend using the 7artisans chart as the method of choice ?   

[AndreasG]

For such purposes I put the camera on a tripod and abuse a bookshelf for focussing - simply focus on the title on the spine of the book with an angle of approx. 45 degr. This gives me a more realistic result compared to a chart on paper.

 

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[epmul]

Hi Andreas,

Thanks for the useful suggestion !

Regards,  epmul

[epmul]

Hi Andreas,

I used your approach, adjusted the flange of the lens as recommended by 7Artisans,  and then checked the calibration using the Leica rangefinder setting and compared it with the Visoflex 020 setting and they coincided !  It saves using the 7Artisans focussing chart to check the adjustment.

Thank goodness - now all is well!

Regards,

 

epmul

Edited February 11, 2021 by epmul

[AndreasG]

Great, enjoy the lens!

[colonel]

On 2/7/2021 at 4:12 PM, epmul said:

Does anyone have experience using a visoflex 020 to calibrate a 50mm f1.1 7Artisans lens for the Leica M10 RF?  Using the supplied focussing chart from 7Artisans as recommended seems more involved. 

Currently, I can see a discrepancy between the focussing using the RF compared to the visoflex 020 - no calibration has been undertaken to-date.

Appreciate any advice or experiences e.g. do you recommend using the 7artisans chart as the method of choice ?   

When I calibrated my TTArtisan 50mm 0.95 I merely took a shot. Adjusted (counterclockwise for back focus, 5mm movement is something like 1-2 inches). Took another shot. Adjusted. took another shot. etc. After around 5 shots I had it spot on at 2m

 

[epmul]

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Hi Colonel,

 

Thanks - it is obviously less complicated that I originally assumed!!

Regards,

 

epmul