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EPIC and NON Full Frame Lenses-What's Going to Happen?

Johnny Friday

Johnny Friday

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checked already, but looking for a specific answer to some questions:

Using NON FULL FRAME rated lenses like Nikon DX lenses (which i have quite a few and hold up nicely using RED 1 MX).....

Question i have is will say my 10-17mm Nikon Fisheye still cover as a 10mm when using Epic in 5k? Or will there be some kind of cropping like on the RED 1 when going to 2k or 3k? I think 1.6 x factor when going to 2k.....

Basically, what the heck is going to happen when i stick on my DX Nikon's while in 5k? Then is there some new software fix or some magic that allows us to dial in 2k, 3k or 4k with any glass and not get the crop factor while using Epic?

.....just need to know if i'm having to TRASH my Nikon DX glass.......
Thanks.....
 
Steve Gal said:
If the lens does not cover a 32mm image circle, then no.
Click to expand...

Thanks Steve, but what then does that mean? Sure i know from all the posts that it does not cover 32mm image circle. So.......then what is the result? some sort of cropping? or will my lens just evaporate?
 
If the image circle is too small, the image recorded will have vignetting.

vignette.jpg



EDIT: I better get quicker at photoshop...
 
It's also worth considering this

http://reduser.net/forum/showpost.php?p=716844&postcount=26

So you'll be able to use your DX lens but, depending upon its image circle, maybe not at the full 5k without vignetting.

I think there have been some examples of lens coverage discussed in the Epic M threads, mostly PL so far, iirc.
 
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So looking at this, what fisheye lens(es) will get a full circular image while maximizing the vertical sensor area on EPIC?

On the RED (via the Nikon mount) a 5.6mm is just a bit to big vertically, and a 4.5mm lens produces an image way to small overall.

Matt
 
WoW! I had no idea it would be so drastic. Is that actually going to be the case with Epic? or is the image merely some highly exaggerated example? That said, i suppose shooting then at 4K, it comes back into the circle and then a 10mm lens becomes something different and a we experience a crop factor??

I'm hoping that the crop factor somehow is going to vanish with some magic though.
 
You can use your DX lenses with Epic. Just shoot 4k or 4kHD. It's still ungodly sharp.

This is my plan.
 
Johnny,

It's what you are used to. A 14mm lens is a 14mm lens. The conversion factor was a method of telling people who were used to a full size sensor or film in 35mm cameras (24x36mm) what the lens would "feel" like on a DX sensor. It is the same lens only you are only using a smaller part of the projected image of the lens. So thus a 14mm lens on a DX sensor would feel like between a 20 and 24mm lens (actually 22.4mm using the 1.6x conversion.) But people who are used to the "feel" of a 14mm lens in shooting 35mm motion picture film already know that the field of view is what it is. As a comparison a still full frame shooter would call a 50 a "normal" lens, AND A CINEMATOGRAPHER WOULD CALL A 50 A MODERATE TELEPHOTO.

That is the real issue - field of view. How much of the scene from a given POV will be seen with a given lens. You are used to what your 14 "sees" on the RED MX sensor. It will "see" more on the Epic sensor, since it is a larger sensor, up to the edge of the projected image (the image circle.)

Hope this helps.
 
If you're interested in the figures, Epic at 5K is closer to APS-H so a 1.3 factor (compared to FF 35mm). Richard's explanation above sums it all up nicely though.
 
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On the 10.5 Nikon fisheye you will want to remove the sides on the lens hood.
Top and Bottom should be okay.
If you do a google search for "10.5 mm nikon fisheye remove lens hood" you will find some pages on how to do this.
I only removed the sides and left the top and bottom. The hood is plastic.
Should cover most of the Epic frame.
Sergei
www.sergeifranklin.com
 
Richard Foster said:
Johnny,

It's what you are used to. A 14mm lens is a 14mm lens. The conversion factor was a method of telling people who were used to a full size sensor or film in 35mm cameras (24x36mm) what the lens would "feel" like on a DX sensor. It is the same lens only you are only using a smaller part of the projected image of the lens. So thus a 14mm lens on a DX sensor would feel like between a 20 and 24mm lens (actually 22.4mm using the 1.6x conversion.) But people who are used to the "feel" of a 14mm lens in shooting 35mm motion picture film already know that the field of view is what it is. As a comparison a still full frame shooter would call a 50 a "normal" lens, AND A CINEMATOGRAPHER WOULD CALL A 50 A MODERATE TELEPHOTO.

That is the real issue - field of view. How much of the scene from a given POV will be seen with a given lens. You are used to what your 14 "sees" on the RED MX sensor. It will "see" more on the Epic sensor, since it is a larger sensor, up to the edge of the projected image (the image circle.)

Hope this helps.
Click to expand...

Richard,
that's the best answer to the dreaded "crop factor" question that I've read to date. When the question comes up again (and it will), I'll just point the person to this post.
 
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