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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

#4K4ALL

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Tarquin Cardona said:
I get this. But what I am trying to clarify is that when we speak of crop are we saying that a 20mm lens will be like a 35mm due to this crop factor? This crop notion in the link is only meaningful as it relates to the crop on say a 6K Dragon sensor to get 4K. I would assume that this 4K camera is a full sensor readout - not reading a portion of a larger sensor. And for lenses it is 1:1. That is what I was trying to fathom when we are speaking about crop factor. Because if it were the former in terms of lensing - it would be a complete turkey and I can't believe they would do such a thing.
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All the answers you seek are on that crop factor page.
 
Tarquin Cardona said:
I get this. But what I am trying to clarify is that when we speak of crop are we saying that a 20mm lens will be like a 35mm due to this crop factor? This crop notion in the link is only meaningful as it relates to the crop on say a 6K Dragon sensor to get 4K. I would assume that this 4K camera is a full sensor readout - not reading a portion of a larger sensor. And for lenses it is 1:1. That is what I was trying to fathom when we are speaking about crop factor. Because if it were the former in terms of lensing - it would be a complete turkey and I can't believe they would do such a thing.
Click to expand...

4k is 4096 pixels large. Dragon sensor pixel size is 5 microns. You can't change that. It means it will be 20,58mm large no matter what. Like Scarlet Dragon 5k is cropped too compared to 6K. It's not full sensor neither.
 
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Nothing inherently wrong with a smaller sensor size. Good for gimbals/drones and doc style shooting.

But the lens mount looks kind of big in the first image. An EF mount would be a "mistake" and pretty challenging. Not sure I buy into the idea of a smaller sensor crop out of the Dragon wafer.
 
OK. So what we are saying then is that unlike say a C300MK2 4K camera where a 25mm lens is a 25mm lens. A Raven crop makes it a longer lens by 1.75 - a la a GH4.
 
Tarquin Cardona said:
OK. So what we are saying then is that unlike say a C300MK2 4K camera where a 25mm lens is a 25mm lens. A Raven crop makes it a longer lens by 1.75 - a la a GH4.
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The crop factor is from full frame. C300 MK2 is cropped too. Its sensor size is 24,6x13,8mm. Vs 20,58 x 10,8 for Dragon 4k. A 25mm lens is always a 25mm lens, it just appears cropped because it's using a smaller part of the sensor, and so the field of view is reduced, you can then compare this field of view to a longer lens in 35mm FF. It's just about comparing, the lens is not changing. Red 4k is more cropped than C300 MK2. The true S35 with Dragon is @5k.
 
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Any chance a speedbooster could work. Not sure about the flange distance and if its possible. Never heard of anyone using a speedbooster on a RED cam.
 
Tarquin Cardona said:
I get this. But what I am trying to clarify is that when we speak of crop are we saying that a 20mm lens will be like a 35mm due to this crop factor? This crop notion in the link is only meaningful as it relates to the crop on say a 6K Dragon sensor to get 4K. I would assume that this 4K camera is a full sensor readout - not reading a portion of a larger sensor. And for lenses it is 1:1. That is what I was trying to fathom when we are speaking about crop factor. Because if it were the former in terms of lensing - it would be a complete turkey and I can't believe they would do such a thing.
Click to expand...

You can change the tab on that page to be in reference of a 35mm or 6k Dragon. But to answer your question, it is the first answer. A 20mm lens will be ~38mm at 4k on the dragon sensor (in comparison to 35mm sensor size).
 
You should probably be looking at those 'crops' in relation to a S35mm movie camera sensor as opposed to a full-frame 35mm stills film sensor.

S35 is already a 1.5 crop from full frame stills 35mm

CropperCapture89.jpg
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Edit to add:

NSQJee5O.jpg
 
Tarquin Cardona said:
OK. So what we are saying then is that unlike say a C300MK2 4K camera where a 25mm lens is a 25mm lens. A Raven crop makes it a longer lens by 1.75 - a la a GH4.
Click to expand...

C300 crop factor is 1.5 or thereabouts if memory serves. Higher if you're doing high fps.
 
I agree...I think a MFT RED cam with the right specs and an E mount would be a hit. If the right system was set up to adapt to S35...and this truly is a less expensive camera....it would wipe the floor with the competition.
 
Thanks Bob. It is weird but I never thought about the micron issue till now. So I see why the fuss over A7S and other sensors with bigger pixels comes to the party. Interesting.
 
Tarquin Cardona said:
Thanks Bob. It is weird but I never thought about the micron issue till now. So I see why the fuss over A7S and other sensors with bigger pixels comes to the party. Interesting.
Click to expand...

Larger pixels = larger field of view, better in low light, softer image
Smaller pixels = cropped field of view (unless you increase pixel count), sharper image
 
AndreeMarkefors said:
Nothing inherently wrong with a smaller sensor size. Good for gimbals/drones and doc style shooting.

But the lens mount looks kind of big in the first image. An EF mount would be a "mistake" and pretty challenging. Not sure I buy into the idea of a smaller sensor crop out of the Dragon wafer.
Click to expand...
We don't know yet what the resolution will be limited too. All we know is it it has 4K 120.
 
Jeffrey Loewe said:
We don't know yet what the resolution will be limited too. All we know is it it has 4K 120.
Click to expand...

I guess starting the tease with "4K4ALL" would be a really bad marketing choice if the camera could do 5K. I guess i would call it .... "5K4ALL" then.
 
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