Diy pentamirror blueprint
Re: Diy pentamirror blueprint
Thanks, I see now how that reflex viewer idea works with one more mirror and a viewfinder. I've actually seen it on a medium format camera once briefly but didn't put the pieces together. i was thinking about putting the extra mirror in front of the lens, which didn't work but now I see the mirror goes behind the focusing screen with an added viewfinder lens. The viewfinder lens is another flip to correct for upside down which was left out in the configuration with the added mirror in front, between the lens and subject. I will be setting up something like that in the future. That's great how it eliminates the need for a black cloth over your head.
Without that revelation, I went ahead with the opaque white 'movie' projection screen option instead of ground glass. Viewing by eye is awkward but set a cell phone on the peep hole and it works great. The tilt/shift/marionette focusing mechanism also works flawlessly and intuitively: https://photos.google.com/photo/AF1QipN0eIik_m1aGV1iBaMMEOtVcaxgPwnJvcpAl2cU
All that remains is to run a cable around the top of the box with a clamp lever arm to lock in the 3-D marionette focusing system ropes. Tightening the cable will push down spring loaded brakes to set all 4 rope locations - simple solution.
Note in the video that one of the ropes would have been right in the middle of the lens view so it had to be re-routed with pulleys on a plywood U-shaped frame.
|
Post
(hide subjects)
|
Posted by
|
When
|
|
|
|
|
Apr 1, 2019
|
|
|
|
|
Apr 2, 2019
|
|
|
|
|
Apr 11, 2019
|
1 |
|
|
|
Apr 11, 2019
|
|
|
|
|
Apr 12, 2019
|
1 |
|
|
|
Apr 15, 2019
|
|
Keyboard shortcuts:
FForum
PPrevious
NNext
WNext unread
UUpvote
SSubscribe
RReply
QQuote
BBookmark
MMy threads
Color scheme?
Blue /
Yellow
The Sony ZV-E1 is the company's latest vlogging-focused camera: a full-frame mirrorless camera based the FX3/a7S III sensor, aimed at YouTubers and 'creators' looking to go pro.
The Sony ZV-E1 is a full frame camera targeting YouTubers. Chris and Jordan are Youtubers, what do they think?
Fujifilm's X-H2 is a high-resolution stills and video camera, that sits alongside the high-speed X-H2S at the pinnacle of the company's range of X-mount APS-C mirrorless cameras. We dug into what it does and what it means.
Holy Stone produces dozens of low-cost drone models aimed at consumers. We look at the HS710 and HS175D to see if they stack up to other sub-250g offerings. Are these secretly great or more like toys?
It's small, light, cheap and extremely wide but is it any good?
Above $2500 cameras tend to become increasingly specialized, making it difficult to select a 'best' option. We case our eye over the options costing more than $2500 but less than $4000, to find the best all-rounder.
There are a lot of photo/video cameras that have found a role as B-cameras on professional film productions or even A-cameras for amateur and independent productions. We've combed through the options and selected our two favorite cameras in this class.
What’s the best camera for around $2000? These capable cameras should be solid and well-built, have both the speed and focus to capture fast action and offer professional-level image quality. In this buying guide we’ve rounded up all the current interchangeable lens cameras costing around $2000 and recommended the best.
Family moments are precious and sometimes you want to capture that time spent with loved ones or friends in better quality than your phone can manage. We've selected a group of cameras that are easy to keep with you, and that can adapt to take photos wherever and whenever something memorable happens.
What's the best camera for shooting sports and action? Fast continuous shooting, reliable autofocus and great battery life are just three of the most important factors. In this buying guide we've rounded-up several great cameras for shooting sports and action, and recommended the best.