4 votes
Accepted

ND filters. Why variable?

ISO isn't magic. When you turn up the iso you're increasing the gain on an amplifier that is amplifying an analogue signal – the light hitting the sensor – and when you amplify a signal you amplify ...
stib's user avatar
  • 13.7k
4 votes
Accepted

Why is my Linear FOV GoPro Hero 4 Black video distorted at edges?

The distortion you are seeing has nothing to do with ProTune or other codec settings. Its perspective distortion caused by the wide focal length of the GoPro Lens + The low quality of the GoPro Lens ...
McFlySoHigh's user avatar
  • 2,487
3 votes

Simulating 1080p pan shot by cropping stationary 4K fisheye footage?

Yes, you can do this successfully. I did it with an overhead 4K action camera with a fixed fisheye lens (YouTube video here). You'll want to remove the distortion in software to "square it up". Then ...
Carl Raymond's user avatar
3 votes
Accepted

How to get the Cinematic look

There are a few important things to consider: Lighting is perhaps the most important aspect to creating a filmic image. A lot of filmmakers like to use natural light such as Innaritu on The Revenant. ...
Alex's user avatar
  • 809
3 votes

Prime or Zoom for Video (Micro Four Thirds)

I have that camera. Here are a few things to consider: The camera doesn't have any in-body stabilization, so the footage can be very shaky unless you're prepared. In my situation, I knew I wanted ...
Jason Conrad's user avatar
  • 4,504
3 votes
Accepted

Prime or Zoom for Video (Micro Four Thirds)

For most people, the first workhorse lens will be a zoom, because of the versatility. Sharpness in lenses isn't a huge factor for video; at HD resolution and below, lenses that photographers turn ...
stib's user avatar
  • 13.7k
3 votes
Accepted

What are the pros and cons of using a 4k to HD digital extender zoom

I've shot 4k footage since 2014, and when mastering in 1080p, I often use digital zoom in post. There are multiple factors I would look at. Cameras that use a single sensor will display debeyering ...
Iaian7's user avatar
  • 46
3 votes
Accepted

Using a K-mount lens for Emount camera

If you have your heart set on that particular lens, go for it! That's exactly what adapters are built for, after all. I have a Pentax 50mm F1.7 that I use with a K-Mount to EF-Mount adapter on my EOS ...
MoritzLost's user avatar
  • 5,412
2 votes

Lens that doesn't make faces look fat

Typically recommended portrait lenses are around 85mm to 135m. These numbers refer to full frame cameras. Since you are using a m43 camera with a crop factor of 2x you should investigate lenses from ...
kazanaki's user avatar
  • 494
2 votes
Accepted

Sigma 18-35mm, f/1.8 DC HSM ART Image Circle / BMPCC4k with 0.71x

Your calculations are right. But if you take a look here: https://www.fredmiranda.com/forum/topic/1279757/0 The vignette is much stronger. With the images provided by Aloicious I get a vignette.
Tim's user avatar
  • 58
2 votes
Accepted

Manual Lens Distortion - Continuously Stretching Image

You could use an adjustment layer with the bulge distortion effect or the bezier warp effect applied, and then animate the image underneath. If you don't want that same effect applied to the ...
D34DC3N73R's user avatar
2 votes
Accepted

Will Canon lens work with a7s II?

Ah yes, Canon lenses are a lot cheaper it seems than Sony lenses. With the A7s ii you an use both APS-C and FF (full frame) lenses. With an APS-C lens you have to enable APS-C mode in the camera and ...
Alex's user avatar
  • 809
2 votes
Accepted

Vignetting with Sirui Anamorphic Lens on a Sony A7sii

The lens is built for crop-frame [APS-C] cameras, not full-frame. It cannot fill a full 35mm frame, so you get very heavy vignetting. Ref: https://cf.sirui.com/Anamorphic-Lens.html Unless your camera ...
Tetsujin's user avatar
  • 616
1 vote

How can I improve my tracking and manual focusing of fast moving subjects? (using a hybrid mirrorles camera)

I cannot hope to provide a fully-qualified answer to this, but maybe one or two hints towards the right direction. For starters, I don't think you're doing anything 'wrong'. You might need a bit more ...
Tetsujin's user avatar
  • 616
1 vote

How to calculate lenses parameters to record a pc monitor

There is too much information missing to even start to calculate this. We'd need the screen dimensions [4k doesn't tell us anything we need to know] and camera frame size too [crop factor determines ...
Tetsujin's user avatar
  • 616
1 vote

Are there any general focal length rules around videoing a stage show

Unless the dancers are all permanently in a line doing the can-can, there are likely always going to be occasions when masking occurs. I don't see this as being avoidable on a single camera shoot, one ...
Tetsujin's user avatar
  • 616
1 vote
Accepted

How can I remove red dot lens flare from VR footage - Premiere Pro / After Effects

I would try using clone stamp or content aware fill to replace them. You may need to track them first using a single point motion tracker, apply the track to a null, then parent your clone to that ...
tomh's user avatar
  • 7,757
1 vote

How to get fisheye lens border in shot?

I can't answer your question about the lenses, but any good editing software should let you apply a fisheye effect after the fact. Just find the effects menu in whatever software you are using, and ...
267126's user avatar
  • 121
1 vote

Prime or Zoom for Video (Micro Four Thirds)

For videography you do not necessarily look for "a good" lens for pixel peeping, you want a good autofocus system and a wide aperture for a "cinematic look". This depends on what type of videography ...
Rafael's user avatar
  • 1,182
1 vote

Is there any way to get light flares in a canon m50 and its 15-45mm lens?

The focal length of your lens does not necessarily determine wether or not you will see lens-flares. Lens-flares appear by reflecting light within the lenses, often bouncing around which in on itself ...
Florian Claaßen's user avatar
1 vote
Accepted

Should I expect worse video quality with GoPro using lens protectors?

If you use lens-protection of any kind, same with autocue or eyedirect, the additional glass in front of your camera will have some effect, yes. The magnitude of which will vary depending on your uses....
Florian Claaßen's user avatar
1 vote
Accepted

Is it worth it to buy a 50mm 1.8 lens if my camera has a 1.6 crop factor?

No one besides you can answer this question. A Cinema Prime Set pften constists out of a 18mm, 25mm, 35mm, 50mm, 85mm Primes (On Aps-C). It now depends on what you want to shoot. If you mainly shoot ...
Timothy Lukas H.'s user avatar
1 vote
Accepted

Simulating 1080p pan shot by cropping stationary 4K fisheye footage?

Without adjusting for perspective distortion, the panning doesn't look real. The solution is a reframing algorithm that takes perspective distortions= calculations into account in addition to panning ...
Anson Kao's user avatar
  • 121
1 vote

Do teleconverters work properly for recording movies with hybrid cameras?

It really depends on the capabilities of the focus system on the camera and the particular teleconverter and lens used. Since you mention action videos, I assume you will be dependent on autofocus. ...
AJ Henderson's user avatar
  • 19.4k
1 vote
Accepted

Minimum equipment for shooting an event in a dimly lit environment

A tough one. Certainly might be worth wording the client up that it's going to be dark. I'd try and do a test if possible to see exactly how dark it's going to be. I don't think you're going to get a ...
stib's user avatar
  • 13.7k
1 vote

Lens that doesn't make faces look fat

70mm to 100mm is the ideal portrait range. Although I prefer a farther throw many times simply for the look. Wider will distort, longer will compress. 20mm, that's wide- very for full frame or ...
McFlySoHigh's user avatar
  • 2,487
1 vote

Advice on lens for Glidecam

Two things come to my mind: If you never operated or balanced a Glidecam before you will probably have a hard time. When using a Glidecam IS will not make such a big difference but nonetheless there ...
Max's user avatar
  • 196

Only top scored, non community-wiki answers of a minimum length are eligible