brian

Lives in United States Petersburg, VA, United States
Works as a lens designer, photographer, entrepreneur
Joined on Oct 2, 2000

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Snapshot of threads updated recently in which you have recently participated.

Subject Forum Last post
Viltrox M42 (C/Y) to eMount Focal Reducer - Speed Booster Adapted Lens Talk 1 week ago
Metabones Speedbooster on Sony a6000 Sony Alpha / Nex E-mount (APS-C) Talk 3 weeks ago
Relationship between LoCA and focus shift? Photographic Science and Technology 4 weeks ago
Pentx 6x7 Lenses Adapted Lens Talk 1 month ago
MC-11 Canon EF Lens Support on Sony A7RII Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
Olympus and the Metabones Adapter Micro Four Thirds Talk 2 months ago
Adapted Sigma EF DC 18-35mm Art f1.8 to m43 Adapted Lens Talk 3 months ago
Metabones XL Speedbooster not always as speedy as promised Micro Four Thirds Talk 3 months ago
Thoughts on focal reduction adapters Adapted Lens Talk 4 months ago
Big long glass and small crop factor cameras Open Talk 4 months ago
Sell GH4 and buy better lenses for the 600D ? Camera, Lens and System Buying Advice 4 months ago
Metabones Speed Booster - My Twisted Brain has Questions Micro Four Thirds Talk 4 months ago
Metabones Speed Adapter for Nikon F-Mount Lens to M43? Olympus SLR Talk 4 months ago
Metabones Speed booster ultra + E-m5 ii + EF 1.4/35L, 1.2/85Lii, 4/400Lii any good? Micro Four Thirds Talk 4 months ago
Buy Panasonic G7 or Sony A6300? Micro Four Thirds Talk 4 months ago
Just received the new Lens Turbo II... Adapted Lens Talk 4 months ago
FF Oly lens patent Micro Four Thirds Talk 5 months ago
Help me with the speedbooster math Micro Four Thirds Talk 5 months ago
Reply to Why FF sensor isn't less noisy? Micro Four Thirds Talk 5 months ago
We have 'extenders' (or teleconverters) but why we do not have 'reducers' (or wide converters)? Canon SLR Lens Talk 5 months ago
Sigma 18-35 f/1.8 Nikon or Canon Version with speedbooster for GH4? Micro Four Thirds Talk 5 months ago
Weird swirly bokeh when using metabones speedbooster (m4/3) on nex body Sony Alpha / Nex E-mount (APS-C) Talk 6 months ago
Olympus EM1 with metabones speed booster adapter and Tamron 150-600 for Canon Micro Four Thirds Talk 6 months ago
Lens Option: speedbooster with sigma 18-35 vs Leica 42.5 vs 12-35 Panasonic Micro Four Thirds Talk 6 months ago
Making a zoom fast with a focal reducer? Micro Four Thirds Talk 6 months ago
Cheap cheerful and adapted: Yongnuo EF 35/2.0 Adapted Lens Talk 6 months ago
Anyway to go faster the f/1.2 with Canon 50mm 1.2L + 0.64 Metabones SpeedboosteR? Micro Four Thirds Talk 7 months ago
Speed Booster Sony Alpha Full Frame E-mount Talk 7 months ago
Another EF lens passes the torture test Micro Four Thirds Talk 7 months ago
Tamron SP 90 mm f/2.8 Di MACRO is anyone using it on M43? Micro Four Thirds Talk 7 months ago
[QUESTION] the new Metabones Speedbooster XL 0.64x vs Ultra 0.71x for GH4 Canon mount? Micro Four Thirds Talk 7 months ago
DoF simulator Micro Four Thirds Talk 7 months ago
Native lens versus using adapter Sony Alpha Full Frame E-mount Talk 7 months ago
Speedbooster Nikon G user should-knows? Micro Four Thirds Talk 7 months ago
Metabones EF-M43 T Speed Booster ULTRA 0.71x blurry pictures in manual mode on a OMD EM1 Open Talk 8 months ago
“Fastest Lens In the World” – The Handevision Ibelux 40mm f/0.85 Micro Four Thirds Talk 8 months ago
A6000 + Speed booster as good as A7? Sony Alpha / Nex E-mount (APS-C) Talk 8 months ago
Focal reducer question Sony Alpha / Nex E-mount (APS-C) Talk 8 months ago
Canon FD 50mm f/1.2 on Fuji X-T1 and Sony a7 Fujifilm X System / SLR Talk 8 months ago
use a speedbooster with A7rii - help me understand APS-C size Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Metabones announces the new Speedbooster ultra Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Has there ever been zoom adapter ever invented? Mainly for Primes????? Nikon SLR Lens Talk 10 months ago
MTF comparison of original, ULTRA, and XL Speed Boosters for M43 Micro Four Thirds Talk 11 months ago
New Metabones Speed Booster ULTRA M43 with autofocus Micro Four Thirds Talk 11 months ago
Voigtlander 17.5mm vs the Rokinon 24mm w/speedbooster/turbobooster Micro Four Thirds Talk 11 months ago
Metabones 0.64x Speedbooster Micro Four Thirds Talk Jun 11, 2015
All around lens for videos Micro Four Thirds Talk Jun 8, 2015
The new speed limit for m4/3 (at least for GH4) is f/0.80 Micro Four Thirds Talk Jun 7, 2015
Kipon adapter — canon or nikon lenses on OMD Micro Four Thirds Talk May 27, 2015
What are the advantages to full frame Sony Alpha / Nex E-mount (APS-C) Talk Apr 7, 2015