new optics design Focal reducer/Speed booster adapter

for/Nikon AI/AIS/F and G type lenses to m4/3 (mft) mount cameras

All metal structure, with excellent opticals (4 elements/2 groups)


it has the aperture lever pusher ring on the adapter, to allow aperture adjusting with Nikon G lenses


what it does:

  • reduce the focal length (by 0.72x wider)

　

  • effectively increases the maximum aperture of the lens by 1 stop

  • (in other words, under the same aperture, you can use faster shutter speed (by 1 stop).







　 what it does not:

there is no electronic integration, no auto focusing



Note: a customer reported Nikon 50/1.4 AI has the rear protrusion issue; need to file down the protrusion by 1.5mm (still can use with film camera)



Note: the blue dot issue... under certain circumstances.. and for some lenses... it still has it though...   To avoid it... try avoid using small apertures. and avoid direct light in the lens... and/or avoid high contrast...


Comment from customer regarding how to avoid the blue dot: 

" what I've found when in bright daylight its important to keep the sun at your back to avoid the lens coming into direct sun. Though this can be an issue when shooting on water due to the reflection most other times it eliminates the issue. If shooting with the sun in my field of view I've been positioning the blue dot in the sky which helps it to blend in. As you mention a bigger f stop helps, in the Minolta 28mm f2.8 case by f8 most shots I'll be dot less. I also have been running a slightly over-sized hood and a polarization filter both of which I feel help in some small way. " ---  christopherconan 


　

　


sample review of our focal reducer by Joseph Moore


Joseph Moore review of our speed booster




sample review footage of our focal reducer

RJ speed booster review footage 





Shipping Terms

  • Items will be shipped within 2 business day payment received (except weekends and holidays)

    　

  • Items will be shipped by International standard air parcel (unless o/w arranged), which normally takes 10-24 calendar days; there is a register number with each parcel, but it is not traceable online.

　

  • We do combine shipment for discounted shipping cost.

　

Payment Terms

  • We accept PayPal only (all credit card payments have to be done through paypal).

  • Payments need to be made within 3 days auction closed.

Return Policy

  • If the item is found defective within 7 days upon receipt, please contact us and send the item back to us, a replacement will be sent to you

  • Buyers will pay for the postage for the returns. However, we'll cover all the shipping cost for the replacement

  • Shipping and handling charges, insurance are NOT refundable, sorry about that..

　

Any questions ?

Please write me through Ebay messages. Thanks for looking