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
Low light zoom lens for 6500? Sony Alpha / Nex E-mount (APS-C) Talk 16 hours ago
An Alternative to the Pana Leica 200 2.8 is... Micro Four Thirds Talk 2 days ago
Heavy Vignetting using a Zhongyi lens Turbo II and long lenses Adapted Lens Talk 1 week ago
Are Metabones Speedboosters worth the money? Adapted Lens Talk 2 weeks ago
Judging lenses with a Speedbooster. Adapted Lens Talk 3 weeks ago
Adding a Speedbooster to a Mitakon 35mm f/0.95? Adapted Lens Talk 3 weeks ago
GH5: which lens? Sigma 18-35 (speedbooster) or Panasonic 12-35 (native) Micro Four Thirds Talk 3 weeks ago
The opposite of a speedbooster. Does it exist? Open Talk 1 month ago
Metabones Speed Booster Ultra + a6500- incorrect focal length display? Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
New Metabones Speed Booster Q666 0.50x for Pentax Q - (USD 489.00) Adapted Lens Talk 2 months ago
Canon FD 50mm f/1.2 on Fuji X-T1 and Sony a7 Fujifilm X System / SLR Talk 3 months ago
bright(er) superzoom Micro Four Thirds Talk 4 months ago
MFT Lens Turbo II Flare Adapted Lens Talk 5 months ago
Micro Four Thirds Focal Reducer Shootout Micro Four Thirds Talk 5 months ago
minolta lens crashcourse wanted... Adapted Lens Talk 5 months ago
Speedbooster question Micro Four Thirds Talk 5 months ago
Speed booster extra stop? Micro Four Thirds Talk 6 months ago
MC-11 Canon EF Lens Support on Sony A7RII Sony Alpha / Nex E-mount (APS-C) Talk 7 months ago
Exciting Pana announcements, especially for video people. Samsung Talk 8 months ago
Magnification vs Megapixels vs Lens Design Micro Four Thirds Talk 8 months ago
Has anyone gone to e-mount and changed back? Sony Alpha SLR/SLT A-mount Talk 9 months ago
Lens with highest t-stop. Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Canon FD TS 35 2.8: Is the 35mm the Image Circle or what a FF camera sees? Adapted Lens Talk 9 months ago
A7II vs a6000 IQ (Full Frame vs APS-C) Sony Alpha Full Frame E-mount Talk 9 months ago
Ask a question when the answer is known? Adapted Lens Talk 9 months ago
Metabones Speed Booster Ultra + a6500- incorrect focal length display? Adapted Lens Talk 9 months ago
use a speedbooster with A7rii - help me understand APS-C size Sony Alpha / Nex E-mount (APS-C) Talk 9 months ago
Olympus 17mm f/1.2 PRO lens on the roadmap Micro Four Thirds Talk 10 months ago
MFT with ultra wide angle lens for Gx8 Beginners Questions 10 months ago
metabones 'speed booster' 0.58 m43->nikon adapter question Digital Video Talk 11 months ago
New Pocket Cinema Camera Owner! :) Digital Video Talk 11 months ago
Metabones Speed Booster XL 0.64, avoid using on Olympus cameras Micro Four Thirds Talk Dec 19, 2016
IBIS with Speed Booster Vignette Micro Four Thirds Talk Dec 12, 2016
Severe vignetting on 400mm FD f/4.5 SSC with focal reducer adapter Adapted Lens Talk Oct 18, 2016
The Great Debate: $1600 Nocticron vs $4000 Otus Open Talk Sep 27, 2016
GH4 + Speedbooster 0.64x, Sigma 18-35mm in 4k but still some vignetting? Micro Four Thirds Talk Sep 24, 2016
5D IV 4K Update Canon EOS-1D / 5D / 6D Talk Sep 21, 2016
EOS M5 Canon EOS M Talk Sep 11, 2016
Baveyes or LensTurbo? (M42=>MFT) Adapted Lens Talk Aug 16, 2016
Can crop factor be altered by adapters? Camera, Lens and System Buying Advice Aug 10, 2016
Viltrox M42 (C/Y) to eMount Focal Reducer - Speed Booster Adapted Lens Talk Jun 18, 2016
Metabones Speedbooster on Sony a6000 Sony Alpha / Nex E-mount (APS-C) Talk Jun 8, 2016
Relationship between LoCA and focus shift? Photographic Science and Technology Jun 4, 2016
Pentx 6x7 Lenses Adapted Lens Talk May 18, 2016
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