brian

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
Buy Panasonic G7 or Sony A6300? Micro Four Thirds Talk 2 hours ago
Metabones Speed booster ultra + E-m5 ii + EF 1.4/35L, 1.2/85Lii, 4/400Lii any good? Micro Four Thirds Talk 6 hours ago
Just received the new Lens Turbo II... Adapted Lens Talk 1 day ago
Metabones Speedbooster on Sony a6000 Sony Alpha / Nex E-mount (APS-C) Talk 6 days ago
Metabones Speed Adapter for Nikon F-Mount Lens to M43? Olympus SLR Talk 1 week ago
FF Oly lens patent Micro Four Thirds Talk 1 week ago
Help me with the speedbooster math Micro Four Thirds Talk 3 weeks ago
Reply to Why FF sensor isn't less noisy? Micro Four Thirds Talk 3 weeks ago
We have 'extenders' (or teleconverters) but why we do not have 'reducers' (or wide converters)? Canon SLR Lens Talk 1 month ago
Sigma 18-35 f/1.8 Nikon or Canon Version with speedbooster for GH4? Micro Four Thirds Talk 1 month ago
Thoughts on focal reduction adapters Adapted Lens Talk 1 month ago
Weird swirly bokeh when using metabones speedbooster (m4/3) on nex body Sony Alpha / Nex E-mount (APS-C) Talk 2 months ago
Olympus EM1 with metabones speed booster adapter and Tamron 150-600 for Canon Micro Four Thirds Talk 2 months ago
Lens Option: speedbooster with sigma 18-35 vs Leica 42.5 vs 12-35 Panasonic Micro Four Thirds Talk 2 months ago
Making a zoom fast with a focal reducer? Micro Four Thirds Talk 2 months ago
Cheap cheerful and adapted: Yongnuo EF 35/2.0 Adapted Lens Talk 2 months ago
Anyway to go faster the f/1.2 with Canon 50mm 1.2L + 0.64 Metabones SpeedboosteR? Micro Four Thirds Talk 3 months ago
Speed Booster Sony Alpha Full Frame E-mount Talk 3 months ago
Another EF lens passes the torture test Micro Four Thirds Talk 3 months ago
Metabones XL Speedbooster not always as speedy as promised Micro Four Thirds Talk 3 months ago
Tamron SP 90 mm f/2.8 Di MACRO is anyone using it on M43? Micro Four Thirds Talk 3 months ago
[QUESTION] the new Metabones Speedbooster XL 0.64x vs Ultra 0.71x for GH4 Canon mount? Micro Four Thirds Talk 3 months ago
DoF simulator Micro Four Thirds Talk 3 months ago
Native lens versus using adapter Sony Alpha Full Frame E-mount Talk 3 months ago
Speedbooster Nikon G user should-knows? Micro Four Thirds Talk 3 months ago
Metabones EF-M43 T Speed Booster ULTRA 0.71x blurry pictures in manual mode on a OMD EM1 Open Talk 4 months ago
“Fastest Lens In the World” – The Handevision Ibelux 40mm f/0.85 Micro Four Thirds Talk 4 months ago
A6000 + Speed booster as good as A7? Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
Focal reducer question Sony Alpha / Nex E-mount (APS-C) Talk 4 months ago
Canon FD 50mm f/1.2 on Fuji X-T1 and Sony a7 Fujifilm X System / SLR Talk 4 months ago
use a speedbooster with A7rii - help me understand APS-C size Sony Alpha / Nex E-mount (APS-C) Talk 5 months ago
Olympus and the Metabones Adapter Micro Four Thirds Talk 5 months ago
Metabones announces the new Speedbooster ultra Sony Alpha / Nex E-mount (APS-C) Talk 5 months ago
Has there ever been zoom adapter ever invented? Mainly for Primes????? Nikon SLR Lens Talk 6 months ago
MTF comparison of original, ULTRA, and XL Speed Boosters for M43 Micro Four Thirds Talk 7 months ago
New Metabones Speed Booster ULTRA M43 with autofocus Micro Four Thirds Talk 7 months ago
Voigtlander 17.5mm vs the Rokinon 24mm w/speedbooster/turbobooster Micro Four Thirds Talk 7 months ago
Metabones 0.64x Speedbooster Micro Four Thirds Talk 8 months ago
All around lens for videos Micro Four Thirds Talk 8 months ago
The new speed limit for m4/3 (at least for GH4) is f/0.80 Micro Four Thirds Talk 8 months ago
Kipon adapter — canon or nikon lenses on OMD Micro Four Thirds Talk 9 months ago
What are the advantages to full frame Sony Alpha / Nex E-mount (APS-C) Talk 10 months ago
Oh boy. What are we anticipating for April Fools' jokes in the photo realm this year? Open Talk 10 months ago
Crop Factor - GH4 and Metabones Speedbooster Beginners Questions 11 months ago
Can you give any Nikon Lens have Aperture Ring on it. D-Type Nikon SLR Lens Talk 11 months ago
Panasonic 12-35mm f2.8 vs Sigma 18-35mm f1.8 w/Metabones Speedbooster EF to M43? Micro Four Thirds Talk 11 months ago
Metabones Speed Booster "ULTRA" - Fujifilm X System / SLR Talk 11 months ago
Any one have F/1.2 lens on Micro Camera ? Micro Four Thirds Talk 11 months ago
first fuji...have I thought it through? Fujifilm X System / SLR Talk Feb 25, 2015
Wow!! Why is it taking so long for DPREVIEW to release the final verdict on the NX 1 Samsung Talk Feb 21, 2015