the Lens Doctor 
Fluid Variable Aperture
Click Stop removal

We were recently requested to carry out some work for a gentleman who supplied us with Various Manual lenses that he wanted refurbished, and as he was using these lenses exclusively for H.D. video work, his request was to ask, could we remove the Click stop from the lens?. This is the aperture control usually found on the F stop ring on your lens that selects your chosen aperture and clicks when moved for selection. Although we did remove the click stop, it was found that the aperture control was very slack with the slightest movement disturbing the aperture control, which was of no use at all. We therefore set about and have designed our new One Movement Variable Fluid Aperture System, this system allows full variable aperture control without Click stops, but gives a very positive fluid resistance to allow the variable aperture system to stay in place when the operation is at the chosen aperture state, very much like expensive lenses dampening movement when focusing or zooming, so the aperture selection can go from fully open to fully closed in one sweep, with no bumps or clicks and will remain at the selected aperture just where the operator wants it to be. Absolutely vital and a must have for DSLR HD video work.


This system can now be applied to any manual lens, although not all lenses are the same, and costing's of this system will vary from lens to lens. But we have now converted many of the wider angle lenses, and have many customers now asking for this system to be installed into there lenses. Please contact us for a costing of this system being applied to your own lens. Please see pictures of the One Movement Variable Fluid Aperture System applied to the Vivitar 24mm F2 (opposite) and also our full professional conversion to Canon EOS EF again without corrective glass. Some of the lenses we have installed this system to include :