Scarlet Fixed Focal Length?

[Spencer Broschard]

So I've seen many posts on what people think the focal length of the fixed scarlet is going to be, but they all seem to have different answers. Does anybody know for sure? Most people seem to agree that the aperture is going to be f2.4, is this correct as well?

thanks in advance!

 

[Zac C]

http://www.reduser.net/forum/showthread.php?t=45431

1 What is the focal length of Fixed 2/3" Scarlet?

FF35 Equivalent of 28mm-224mm.

 

[Jeff Kilgroe]

EDIT> I corrected my derived approximation to reflect the actual numbers: 7.5-58mm as per Jarred via Lawrence's link below.

 

[Spencer Broschard]

thanks for the answers, but this is what I was confused about...I'm just an amature so I don't know how to interpret that! I have a canon 550d right now and I have a canon 50mm and a tamron 17-50mm, so could you relate it to those lenses so I can get more of an understanding?

 

[Jeff Kilgroe]

According to Jarred Land, it's 7.5-58 mm (why it's not 7.5-60 mm, I don't know). This is, of course, subject to change.

Lawrence, thanks for the link, I had missed that for some reason. ...Or forgotten in the midst of all things.

Yeah, my numbers are probably off due to the 28-224mm figure also seemingly being off a bit. Since I worked backward from that via AOV comparisons and assuming a 3072 pixel width at 3.3 micron pixels = 10.137mm sensor width. If indeed that is the correct sensor dimension, then the Scarlet lens should be equivalent to 26.6mm on FF35 at the wide end. And yeah, why not 7.5-60? But I guess calling it an 8X lens is better than a 7.73X lens...

thanks for the answers, but this is what I was confused about...I'm just an amature so I don't know how to interpret that! I have a canon 550d right now and I have a canon 50mm and a tamron 17-50mm, so could you relate it to those lenses so I can get more of an understanding?

Focal length numbers represent the physical distance from the primary lensing element to the point of convergence (focus). Longer focal lengths create a narrower angle of convergence / view and shorter focal lengths create a wider angle. Different types of lenses provide differing areas of coverage (the diameter of the image circle) that actually gets projected onto the image plane -- your film or sensor. Smaller sensors require smaller areas of coverage, so lenses can be made smaller, but focal lengths still remain exactly what they say they are. That actual distance between the two points. And due to the area within the image circle taken up by the imager (film or sensor), smaller imagers will use shorter focal lengths in relation to larger imagers when trying to maintain similar framing and subject distances.

Your Canon 550d has an APS-C sized sensor, which is 22.3mm wide and very similar in width to the RED One or Super35 cameras. So it's smaller than the 36mm width of a Full Frame 35mm imager and quite a bit larger than micro4/3 and even larger still than 2/3" or 1/3", etc..

If you are familiar with a 17-50mm zoom on your Canon 550d, that is roughly equivalent to a 27-80mm in FF35 terms. Or if we want to relate the Scarlet 8X to your 550d, it would be similar to shooting a 16.5-127mm zoom on your Canon 550d. So not much different than your 17-50 zoom, other than you'll be able to zoom in a lot closer with the Scarlet, while being similar on the wide angle end.

 

[David Quinn Carder]

Jeff, at what focal length would the fixed-lens Scarlet not have any perspective distortion? And by that I mean, the sizes of background and foreground elements relative to each other are the same as with the naked eye.

 

[Pietro Impagliazzo]

Jeff, at what focal length would the fixed-lens Scarlet not have any perspective distortion? And by that I mean, the sizes of background and foreground elements relative to each other are the same as with the naked eye.

I know this thread is old-ish, but I'd like to ask the same question David asked.

And if the RED team is willing to share some new info on the 8x zoom, feel free to do so! :beer: