Parfocal zoom lenses Instagram made me buy

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2x B4 to E adapter: https://geni.us/XDrLO
2x B4 to PL adapter (I should have bought this one): https://geni.us/TJemzl
B4 back lens caps (none of my lenses came with these): https://geni.us/d5Thk
FX6 tilta kit: https://geni.us/UIAtPf
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Exploring sub-$100 b4 zoom lenses on full frame cameras, there are a lot of trade offs to be made - but I absolutely love the soft, warm and imperfect image these lenses produce. You can get sharper results using higher-quality b4 zooms on an aps-c or super 35 cameras, but I love the look of the cheaper lenses on full frame cameras.

I would zoom in post to remove the vignetting, but I found it difficult to find videos that left the vignetting in - so I decided to leave it in for this video. I know it's probably distracting but that is how it looks with and without clear image zoom enabled.

There are also a lot of factors, like the lens having a 2x adapter built in, or an adapter with a 2x adapter. I chose to buy cheaper lenses, and a more expensive adapter with the 2x inside the adapter. More expensive lenses have the 2x built in.

James' video about backfocusing:    • How to Back-Focus a Broadcast Zoom Lens (E...  

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00:00 B4 Lens Intro
01:03 When the problems started
01:58 An eBay come up, buying b4 zoom lenses
02:55 These are cheaper b4 lenses. Compromises will have to be made
03:43 Problem 1: Adapters and sensor coverage
05:16 Motion Array
06:39 Problem 2: Not Parfocal, adjusting back focus
07:51 Problem 3: Smooth zooms & powering the servo motor
10:30 12-pin vs 6-pin. Pricing and availability matters
11:50 Problem 4: Camera Rig
15:38 Problem 5: Stability
16:29: Problem 6: I Broke my Canon J15. Kind of cool though
18:22 Misc Thoughts: Consider your adapter wisely
19:11 Getting the best zooooooms
20:00 Light Hungry
20:33 Delicate and can break
20:42 Just another tool
21:57 This is only the beginning

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Amazon and B&H links in this description box and on my website are affiliate links, I make a commission if you decide to purchase using these links.

All opinions are my own and not influenced by anyone.

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Keith Knittel
14837 Detroit Ave, Ste 187
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