Prime lens calculation

[jorge krausch]

If you had the budget for a 24-70 II lens, but decided to get a few primes, which would they be (low light) within that budget?


To get 50mm on a RED EPIC, do i need a 35mm?

Thanks

ps: for filming, not photography

 

[jorge krausch]

i know beginners are annoying but come oooonnn

 

[Phil Arntz]

What resolution on the EPIC? Different resolution have different crops, so your "focal length" (I think correct term would be field of view) will be different in 1K,2K,3K,4K,5K..

A 50mm lens is a 50mm lens no matter what. The question is what you are comparing it to. A 50mm lens will have a different field of view on a 5D, 7D, EPIC in different resolutions etc.

If I had the budget for a 24-70mm II and get primes instead? Rokinon Cine primes.

I'd get a 24 1.4, 35 1.4,85 1.4. They are currently working on a 50mm too. If you want something on the wider end, 14mm F2.8. They build it too!

Hope that helps!

 

[Oliver Skibbe]

http://www.reduser.net/forum/showthread.php?28213-Field-of-view-factor-for-4K-to-3K-2K

http://www.reduser.net/forum/showthread.php?77349-Epic-M-and-X-Data-Sheet

 

[Yannick Verry]

You can find a lot of information about that subject on the forum.
But I would say for about 2000 pounds you could go the Rokinon way, and buy the 24/1.4, the 35/1.4 and the 85/1.4. Plus a Zeiss 50/1.4.

 

[jorge krausch]

Thanks so much Yes I meant field of view on full sensor use. 5K.

I guess to rephrase i would say:

If I had a Red Epic and a Canon 5D side by side:

The 5D has a 85mm lens on. Which lens will give the Red Epic the same field of view and DOF, bokah etc.. as my 5D ?

 

[jorge krausch]

OK that second link answers it..
http://www.artbyphil.com/temp/redEpicMandXNotes/RedEpicMandXDataSheet_2k.png

(if i understand FF35 is like a Canon 5D sensor?) So a 64mm lens (if it existed) would give me 85mm FOV on the Red Epic.. ?

 

[jorge krausch]

LOVE this chart.. thanks Oliver.. So if i were to shoot 2K on the RED epic and wanted 85mm view, Id use a 25mm according to the chart..

Again, assuming FF35 is the full size sensor designed for Canon L photo lenses.

 

[Andy White]

I posted this link on your other thread http://www.abelcine.com/fov/ - it will help you visualize things.

 

[jorge krausch]

Thanks Andy.. this is all so much info.. great!!
Weird, Link A says its a 1.4 crop factor, and Link B says its 1.3 crop.. perhaps because its 16:9 at abelcine?

A: http://www.abelcine.com/fov/
B: http://www.artbyphil.com/temp/redEpicMandXNotes/RedEpicMandXDataSheet_5k.png