FS700 With Macro Lens Issue

Chris Slade · July 20th, 2014, 07:47 AM

Hey

My polarising filter arrived yesterday so I will do some test shots today and get them up later to see what difference that makes.

Thanks for replying Alister. You are right regarding the parallel point, I was going to experiment with angles last today as well and yes you are correct as I change focus the line moves backwards and forwards.

Sorry to seem stupid again but do you recommend a certain soft focus filter or are they pretty universal?

Thanks guys!

Matt Davis · July 20th, 2014, 09:20 AM

Alister's beaten us all to it - yes, it's Moire: you're going into Macro mode, the screen is very high resolution, but at some point the two resolutions are going to interfere.

It's an awful fact of life, but in these situations (filming LCD screens in general) it's going to bite you, and blurring in post isn't going to help. Blurring in production - just by a teeny weeny bit - will save bacon. Take solace in the fact that your lens and sensor are 'too good' LOL.

I have to film a lot of screens - if I need clean results, then a screen capture app running on the platform (or on a desktop emulator) is the way to go, even if it means a bit of 'faking it' in post. FWIW, I get a lot of trouble with Samsung screens, for which you really need ECS (Electronically Controlled Shutter, or your brand's equivalent thereof) to fine tune your shutter speed to get rid of travelling bands on the screen. This moire problem is about shunting the focus off by just enough to lose the pattern, but this can limit the angles at which you can shoot.

Just a £0.02p thought...

Chris Slade · July 22nd, 2014, 06:08 AM

I only got totally confused and ordered the wrong size polarising filter. Damn late nights!

Made sure I ordered the right size soft focus filter so I'm looking forward to this arriving tomrrow. I was doing some other test shots and I'm even getting the line across the back of the phones..... This is very bad news haha.

I'm going to film some tests after I post this so I should have something to share later on.

Cheers

Chris Slade · July 22nd, 2014, 08:17 AM

Having just used the macro lens to look at a particularly patterned cushion I am getting the same line going across as I pull focus so I guess we can confirm this is a moire issue.

I'll upload all of this stuff later today

July 20th, 2014, 07:47 AM	#16
Chris Slade New Boot Join Date: Jun 2014 Location: Stoke On Trent Posts: 9	Re: FS700 With Macro Lens Issue Hey My polarising filter arrived yesterday so I will do some test shots today and get them up later to see what difference that makes. Thanks for replying Alister. You are right regarding the parallel point, I was going to experiment with angles last today as well and yes you are correct as I change focus the line moves backwards and forwards. Sorry to seem stupid again but do you recommend a certain soft focus filter or are they pretty universal? Thanks guys!

July 20th, 2014, 09:20 AM	#17
Matt Davis Trustee Join Date: Aug 2005 Location: Berkshire, UK Posts: 1,562	Re: FS700 With Macro Lens Issue Alister's beaten us all to it - yes, it's Moire: you're going into Macro mode, the screen is very high resolution, but at some point the two resolutions are going to interfere. It's an awful fact of life, but in these situations (filming LCD screens in general) it's going to bite you, and blurring in post isn't going to help. Blurring in production - just by a teeny weeny bit - will save bacon. Take solace in the fact that your lens and sensor are 'too good' LOL. I have to film a lot of screens - if I need clean results, then a screen capture app running on the platform (or on a desktop emulator) is the way to go, even if it means a bit of 'faking it' in post. FWIW, I get a lot of trouble with Samsung screens, for which you really need ECS (Electronically Controlled Shutter, or your brand's equivalent thereof) to fine tune your shutter speed to get rid of travelling bands on the screen. This moire problem is about shunting the focus off by just enough to lose the pattern, but this can limit the angles at which you can shoot. Just a £0.02p thought... __________________ Director/Editor - MDMA Ltd: Write, Shoot, Edit, Publish - mattdavis.pro EX1 x2, C100 --> FCPX & PPro6

July 22nd, 2014, 06:08 AM	#18
Chris Slade New Boot Join Date: Jun 2014 Location: Stoke On Trent Posts: 9	Re: FS700 With Macro Lens Issue I only got totally confused and ordered the wrong size polarising filter. Damn late nights! Made sure I ordered the right size soft focus filter so I'm looking forward to this arriving tomrrow. I was doing some other test shots and I'm even getting the line across the back of the phones..... This is very bad news haha. I'm going to film some tests after I post this so I should have something to share later on. Cheers

July 22nd, 2014, 08:17 AM	#19
Chris Slade New Boot Join Date: Jun 2014 Location: Stoke On Trent Posts: 9	Re: FS700 With Macro Lens Issue Having just used the macro lens to look at a particularly patterned cushion I am getting the same line going across as I pull focus so I guess we can confirm this is a moire issue. I'll upload all of this stuff later today