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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Subject Forum Last post
Exciting Pana announcements, especially for video people. Samsung Talk 2 weeks ago
Magnification vs Megapixels vs Lens Design Micro Four Thirds Talk 4 weeks ago
Has anyone gone to e-mount and changed back? Sony Alpha SLR/SLT A-mount Talk 1 month ago
Lens with highest t-stop. Sony Alpha / Nex E-mount (APS-C) Talk 1 month ago
Canon FD TS 35 2.8: Is the 35mm the Image Circle or what a FF camera sees? Adapted Lens Talk 1 month ago
A7II vs a6000 IQ (Full Frame vs APS-C) Sony Alpha Full Frame E-mount Talk 1 month ago
Ask a question when the answer is known? Adapted Lens Talk 1 month ago
Metabones Speed Booster Ultra + a6500- incorrect focal length display? Adapted Lens Talk 1 month ago
Metabones Speed Booster Ultra + a6500- incorrect focal length display? Sony Alpha / Nex E-mount (APS-C) Talk 1 month ago
use a speedbooster with A7rii - help me understand APS-C size Sony Alpha / Nex E-mount (APS-C) Talk 1 month ago
Olympus 17mm f/1.2 PRO lens on the roadmap Micro Four Thirds Talk 2 months ago
MFT with ultra wide angle lens for Gx8 Beginners Questions 2 months ago
metabones 'speed booster' 0.58 m43->nikon adapter question Digital Video Talk 3 months ago
New Pocket Cinema Camera Owner! :) Digital Video Talk 3 months ago
Metabones Speed Booster XL 0.64, avoid using on Olympus cameras Micro Four Thirds Talk 4 months ago
IBIS with Speed Booster Vignette Micro Four Thirds Talk 4 months ago
MC-11 Canon EF Lens Support on Sony A7RII Sony Alpha / Nex E-mount (APS-C) Talk 5 months ago
Severe vignetting on 400mm FD f/4.5 SSC with focal reducer adapter Adapted Lens Talk 6 months ago
The Great Debate: $1600 Nocticron vs $4000 Otus Open Talk 7 months ago
GH4 + Speedbooster 0.64x, Sigma 18-35mm in 4k but still some vignetting? Micro Four Thirds Talk 7 months ago
5D IV 4K Update Canon EOS-1D / 5D / 6D Talk 7 months ago
EOS M5 Canon EOS M Talk 7 months ago
Baveyes or LensTurbo? (M42=>MFT) Adapted Lens Talk 8 months ago
Can crop factor be altered by adapters? Camera, Lens and System Buying Advice 8 months ago
Viltrox M42 (C/Y) to eMount Focal Reducer - Speed Booster Adapted Lens Talk 10 months ago
Metabones Speedbooster on Sony a6000 Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
Relationship between LoCA and focus shift? Photographic Science and Technology 10 months ago
Pentx 6x7 Lenses Adapted Lens Talk 11 months ago
Olympus and the Metabones Adapter Micro Four Thirds Talk Apr 13, 2016
Adapted Sigma EF DC 18-35mm Art f1.8 to m43 Adapted Lens Talk Mar 25, 2016
Metabones XL Speedbooster not always as speedy as promised Micro Four Thirds Talk Mar 16, 2016
Thoughts on focal reduction adapters Adapted Lens Talk Feb 26, 2016
Big long glass and small crop factor cameras Open Talk Feb 24, 2016
Sell GH4 and buy better lenses for the 600D ? Camera, Lens and System Buying Advice Feb 23, 2016
Metabones Speed Booster - My Twisted Brain has Questions Micro Four Thirds Talk Feb 23, 2016
Metabones Speed Adapter for Nikon F-Mount Lens to M43? Olympus SLR Talk Feb 14, 2016
Metabones Speed booster ultra + E-m5 ii + EF 1.4/35L, 1.2/85Lii, 4/400Lii any good? Micro Four Thirds Talk Feb 8, 2016
Buy Panasonic G7 or Sony A6300? Micro Four Thirds Talk Feb 8, 2016
Just received the new Lens Turbo II... Adapted Lens Talk Feb 5, 2016
FF Oly lens patent Micro Four Thirds Talk Jan 27, 2016
Help me with the speedbooster math Micro Four Thirds Talk Jan 18, 2016
Reply to Why FF sensor isn't less noisy? Micro Four Thirds Talk Jan 15, 2016
We have 'extenders' (or teleconverters) but why we do not have 'reducers' (or wide converters)? Canon SLR Lens Talk Jan 10, 2016
Sigma 18-35 f/1.8 Nikon or Canon Version with speedbooster for GH4? Micro Four Thirds Talk Jan 4, 2016
Weird swirly bokeh when using metabones speedbooster (m4/3) on nex body Sony Alpha / Nex E-mount (APS-C) Talk Dec 22, 2015
Olympus EM1 with metabones speed booster adapter and Tamron 150-600 for Canon Micro Four Thirds Talk Dec 5, 2015
Lens Option: speedbooster with sigma 18-35 vs Leica 42.5 vs 12-35 Panasonic Micro Four Thirds Talk Dec 2, 2015
Making a zoom fast with a focal reducer? Micro Four Thirds Talk Dec 2, 2015
Cheap cheerful and adapted: Yongnuo EF 35/2.0 Adapted Lens Talk Dec 1, 2015
Anyway to go faster the f/1.2 with Canon 50mm 1.2L + 0.64 Metabones SpeedboosteR? Micro Four Thirds Talk Nov 28, 2015