Scarlet and Arri/Alura 18-80mm , crop sensor 2k became a 160mm

[Marco Lomiler]

Hi Red dudes.
My first post in the forum , love to read it all night long.

I would like to have a feedback from you guys about this.

Using a Red Scarlet with an Arri/Alura 18-80.
Shooting 4K with 18-80 and if i need a telephoto shooting i just crop the sensor to 2K , so i can reach a 160mm tele.
And knowing that my reality is 2K yet, all my works is finished in 2K.
So why Red? 'cause i love the 13 stops in RedRaw possibilities. Knowing that i could reach a 3:1 compression in 2K/24P
If i would have a very needed 4K finish , i would go to rent a longer lenses.
But thats it. For my everyday works.

Do you think it works?

Thanks a lot.!

 

[Pax]

Marco, rent a longer lense and shoot it all in 4K if you can- it's going to look better. Also shooting in 4K (and a little wider than needed) will let you reframe your shot in your 2K timeline, and you will be able to reframe shots in post and have better color correction results.

 

[Maik Müller]

Do never crop the sensor to get more tele during a shoot. Never think about that again, shoot everything in 4k if you can. The one and only reason to lower the resolution is the need for higher framerates (or HDRX). If you really can't get another lens then you can try to crop/reframe in post, which is still way more flexible than shooting 2k and loosing everything around.

 

[Marco Lomiler]

Thanks Pax and Maik , thinking after reading your posts , sure there is no reason to crop the sensor to get telephoto. :banghead:
Once i can shoot in 4K and reframe it in 2K. rsss

So obvious...

 

[J Taylor]

hey this is a little off topic, but...

I've read a lot about people believing that 2K 60 fps is not up to par, does the same go for 2K 24p or is this just an issue with the higher frame rate?

Also, does the issue exist with 2K HDRx?

 

[Maik Müller]

I've read a lot about people believing that 2K 60 fps is not up to par, does the same go for 2K 24p or is this just an issue with the higher frame rate?
Also, does the issue exist with 2K HDRx?

There is no real issue with shooting 2k. What people often wrongly do is comparing down-sampled 4k-footage with real 2k-samples which are done mostly quick and dirty. Obviously 4k to 2k gives plenty of room to get rid of noise and make images look sharper. 2k-footage isn't technically un-sharper or noisier than 4k-footage, you just loose that bonus of oversampling and have to be more careful during the shoot.

The problem i see here is, if you need that bonus to make your footage look good, then there is something wrong with it. It will probably look not so good when watched in 4k. Fine if you're shooting for HD, but isn't getting a Scarlet all about shooting 4k? So try to not rely on that and instead shoot good 4k-footage, because if you do so, then you'll shoot 2k-footage without any real problems.

2k-footage is just a center-crop of 5k/4k-footage, look at really nice samples, crop them down and then you know whats doable.

Framerates or HDRx don't make a difference here, it's all about resolution and the bonus of oversampling. Hmm, well just keep in mind that most 2k-samples are shot at 60fps. That higher framerate results in higher shutterspeed and different exposure (more noise if you don't compensate with opening the iris or add some light).

BTW, shooting 2k @ 24fps doesn't make much sense, the lower resolutions are really only there to allow higher fps and HDRx. And for shooting 24fps with HDRx you can still use 3k. For the future there has been hinted a software upgrade that allows shooting HDRx without the need to halve the framerate.

 

[Mitch Gross]

On the RED, 4K downsampled to 2K will always look better than 2K origination. You can shoot under optimal conditions and this will still hold true.

 

[Maik Müller]

On the RED, 4K downsampled to 2K will always look better than 2K origination. You can shoot under optimal conditions and this will still hold true.

True, nothing will change that. Oversampling is great, thats why EPIC shoots 5k and R1 4.5k, but i think lots of 2k-samples i've seen aren't maxing out Scarlet's potential.

2k in Scarlet is only there to give you 60fps, if you don't need that framerate, then shoot 4k/3k.

 

[Tom.Wong]

remember that you are physically windowing down your sensor area, pretty close to if you shot it in 4k and blew up the shot over 200%. you see more noise, lose details, and won't even come close to resolve the detail the lens has to offer as well. stuff shot in 2k, at best makes a good 720p finish. you will always lose true resolution after a debayer. so unless this is all going to a 720 finish and ending up on facebook and youtube. as everybody said, not a good idea.