handmade dof adapter

T

Takumarr

Well-known member
I would like to make a 35 adapter and test it on the HVX200, to do a lens and the holder and the screen that the image, and a glass to enlarge the image up to 50 mm,
Can I use a medium format lens for this purpose?
Is there an idea?

I know that large sensor cameras have been invented, and my intention is not to return to the last century, it may be worth the test ...
 
I don't see why you couldn't, as long as you don't mind increasing the weight, bulk, power consumption, light loss, image softness, complexity, etc.

Perhaps you could elaborate on your intended goal with the DoF adapter. If you just need shallow DoF, you could try zooming in or using close up filters with the built-in lens.

I think you'll be time and money ahead if you rent or buy a DSLR/Mirrorless camera rather than building a DoF adapter. The DVCPRO HD codec is better on paper than H.264 used on early video DSLRs, but they can be hacked for better results. Certain Canons can be hacked with MagicLantern for 150 Mbps or even RAW video. Certain Nikons can be hacked from 24 Mbps to 64 Mbps. Certain Panasonics can be hacked for 176 Mbps. Modern cameras obviously have better codec and bitrate options, but I assume you're not looking to buy new.

Kipon makes medium format focal reducers, so I see no benefit to using a DoF adapter in chasing after the medium format look.

Full frame cameras & lenses are really the sweat spot in optimising maximum aperture for shallow DoF.

This DIY Perks video might give you some food for thought. It's not a traditional DOF adapter, as those are designed for full frame lenses.


I thought Tony Reale did a DoF adapter vs DSLR bokeh test, but I can't find the video.
 
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Thanks for the description
You asked about my goal, I have to say that the purpose of iis not low dof but a better picture frame and glass, the HVX is a micro mode and can capture FF images from few centimeter with high accuracy, I saw videos. With other lenses where the camera's weaknesses were somewhat compensated, the images were better than the original HVX images, and with better shadows, DOF doesn't matter here,
I just wanted to get a better picture of the camera.

But as you say, this has its own difficulties, and the high weight of the camera and the new tripod and the overwhelming work
Appears to be failing in the DOF theory for HVX in new century
 
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I never shot with a DoF adapter. I was tempted to build one back in the day, but there were too many compromises, and they added video to DSLRs shortly after I got into video, so DoF adapters became obsolete.

I forgot to mention that DoF adapters flip the image upside down, so you either have to get a field monitor capable of flipping the image, or mount your camera upside down using a camera cage, or stand on your head to compose the shot. :grin:

I'm dubious on macro mode + DoF adapter + medium format lens producing a sharper image than the built-in lens at a normal focal length and distance.
If your assertion is correct, it all hinges on the sharpness of your medium format lens, which generally aren't faster than f/2.8, and I think an f/1.4 full frame lens stopped down to f/2.8 will likely be sharper.

Why are you settling on medium format over full frame?

Your built-in lens is probably sharpest around f/8 - f/11, and there will be a sweet spot in the zoom range where the lens is sharpest.

I think you could build a DoF adapter, especially with the prevalence of 3D printers, but I think the money that you'd spend on parts would be better spent toward a Panasonic AF100 or MFT mirrorless camera paired with a focal reducer, which would be more relevant for todays productions.
 
With devotion to the points and your accuracy,

to overthrow my image, a special furniture is used, with the mirror, the filmmaker does not need to rotate the camera, but it won't be easy,

I said the idea of a medium lens for this, because it requires a 30 * 50 image to be on the screen, using the FF lens requires a lens to make the image larger 1.5x otherwise it will be a small 480p That is not beautiful at all, but the medium lens does not require extra glass...
 
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What's your budget for the DoF adapter and medium format lenses?

Even old Russian medium format lenses start at $100, so between the cost of lenses and parts, I don't see how you're better off with a DoF adapter over purchasing a DSLR or mirrorless camera.
 
I will buy a cam, not for better DOF because I will need a lighter cam in any case.
I was thinking about how to get a better image from the HVX200,

Iwill buy GH2 or AF100, about 200$ for body
 
I'm glad that you're looking into MFT cameras, as I believe your interest in DoF adapters came from a mistaken premise.

The Nikon D5300 produced quite detailed 1080P in it's day, and the Canon C100 produced amazing 1080P, due to proper down scaling from a 4k sensor.

I have never seen or read about a DoF adapter increasing sharpness, in fact, they always did the opposite.

I think there are more likely explanations for the perceived better shadows and sharpness you saw in other peoples videos.
They might have done some color grading, and applied an un-sharp mask or upscaling in post processing to improve the footage.

There also might be an explanation why you're getting seemingly inferior shadows and sharpness.

When did you last black balance your HVX200?
Failure to black balance could explain tinted or noisy shadows.

Are you using any filters on the lens?
Some filters will soften the image, due the the glass not being polished enough, and it's especially noticeable at telephoto focal lengths.

Bear in mind that your camera is 19 years old, and has a 720P sensor, so there's a hard ceiling on what it can deliver.
 
Yes MFT cameras are great, i agree

Unfortunately, I don't know anything about the use of Black Balance, in the camera book,wroten balance of colours to made black tone, I think I have never changed it. If it improves the shadows

What I know about HVX has the best video and shadows in cloud light, water vapor in the air and clouds, such as a softener filter and prevents intense light, and more shades and colors appear, severe and sunny lights are the problem of image. The images will often be poor video

I also have to say that there are good videos of the main camera lens, with the use of After Effects or DaVinci, the intense lights have been balanced...
 
I recommend that you reference your manual and black balance your camera right away.
Use a circular polarizer & 0.9 graduated ND filter to tone down high-contrast outdoor scenes. A diffusion panel like a Scrim Jim makes a huge difference.
 
Takumarr said:
I would like to make a 35 adapter and test it on the HVX200, to do a lens and the holder and the screen that the image, and a glass to enlarge the image up to 50 mm,
Can I use a medium format lens for this purpose?
Is there an idea?

I know that large sensor cameras have been invented, and my intention is not to return to the last century, it may be worth the test ...
Click to expand...
Probably simpler and maybe cheaper to buy an old Letus Extreme or Elite 35 spinning ground glass adapter. You just need the correct lens mount ring and away you go.


Good buy on eBay. The Elite model has the benefit of having back focus adjustment. Saves a lot of time during setup.

https://rb.gy/ztoa42

Here is a 15 year old review.


Chris Young
 
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