Kitchen at DVinfo.net

Peter Rush · February 24th, 2015, 11:06 AM

I've recently had a new kitchen fitted so I picked up my A7s and filmed a bit to send to the designer so she could see how her plan worked out

Ivan Mosny · February 25th, 2015, 06:43 AM

Why is there so much aliasing artefacts? Did you use fulframe mode with 50P?

Peter Rush · February 25th, 2015, 10:57 AM

Yes full frame @ 50p - downsized to 1080X720 6Mbps target I'm not seeing many artifacts?

Ivan Mosny · February 25th, 2015, 12:30 PM

Take a look at the door handles. They are living in most shots.
Avoid to use FF at 50P. Its a mode, that can`t (like 120P) make use of full sensor reading. Its terrible compared to FF in 25P (or APS-C in both 25P and 50P). 25P has a clean - perfectly detailed sharp picture absolutelly free of moire and aliasing.

Peter Rush · February 26th, 2015, 02:15 AM

Ivan the reason I used 50p is I wanted really slow tracking movements, my slider is a glidetrack which is an igus slider and sticks a little when sliding slowly - for a slow consistant speed I push it fairly quickly and slow it down 50% on the timeline - 25p would not allow me this

Ivan Mosny · February 26th, 2015, 10:17 AM

Yes - i know. I would love 50P in my A7S in full frame too. But nothing is perfect.
One of biggest advantages of this camera is full readout of the sensor - not possible in this mode.
I love smooth slow slider movements too. For this i decided to buy the fantastic edelkrone slider with action and target module. It let me realize beuatifull movements, that are impossible manually.

Peter Rush · February 27th, 2015, 05:43 AM

Ivan I'm a little confused - are you saying the A7s does not use the full sensor in 50p mode? does using 50p mode engage crop sensor as in APS mode?

I can't find any reference to this in the manual.

Pete

Peter Corbett · February 27th, 2015, 05:49 AM

You have to use crop mode if you are using 50/60P or you will get that horrendous aliasing. Or.....just shoot organic soft BG subjects that don't have a lot of fine detail. Then it works.

Ivan Mosny · February 27th, 2015, 03:43 PM

Quote:

Originally Posted by Peter Rush

Ivan I'm a little confused - are you saying the A7s does not use the full sensor in 50p mode? does using 50p mode engage crop sensor as in APS mode?

This has nothing to do with cropping. Its the method for downscaling from 12Mpx sensor to needed 2Mpx for HD picture. A7S use ‘direct pixel readout’ utilizing the entire width of the full-frame image sensor without line skipping or pixel binning. Therefore in both HD and 4K 25P video acquisition it can read and process data from every one of the sensor’s pixels.
50P have to be twice as faster... and this is probably not possible at this technology level.
There is 50P - but only at the "old school" technology level. The some for 120P.
APS-C is smaler and can be read faster - so its at the best quality in 50P too.

Peter Rush · March 10th, 2015, 06:30 AM

Of course the downside to that is my lenses are all EF and crop when the camera is set to APS-C mode - I could use my speedbooster but that's usually attached to my EA50 and certainly during a wedding shoot don't have time to do all the juggling around.

James Redmond · March 13th, 2015, 07:43 AM

What lens did you use? james

Peter Rush · March 14th, 2015, 06:33 AM

James I used a Tamron 24-70mm f2.8 - I also use Canon 24-105mm f4.0, Canon 70-20mm f2.8 and a Samyang 14mm

All for full frame cameras (EF mount)

Pete

February 24th, 2015, 11:06 AM	#1
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Kitchen I've recently had a new kitchen fitted so I picked up my A7s and filmed a bit to send to the designer so she could see how her plan worked out Kitchen - Filmed with Sony A7s on Vimeo

February 25th, 2015, 06:43 AM	#2
Ivan Mosny Regular Crew Join Date: Sep 2007 Location: Poland Posts: 141	Re: Kitchen Why is there so much aliasing artefacts? Did you use fulframe mode with 50P?

February 25th, 2015, 10:57 AM	#3
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Kitchen Yes full frame @ 50p - downsized to 1080X720 6Mbps target I'm not seeing many artifacts?

February 25th, 2015, 12:30 PM	#4
Ivan Mosny Regular Crew Join Date: Sep 2007 Location: Poland Posts: 141	Re: Kitchen Take a look at the door handles. They are living in most shots. Avoid to use FF at 50P. Its a mode, that can`t (like 120P) make use of full sensor reading. Its terrible compared to FF in 25P (or APS-C in both 25P and 50P). 25P has a clean - perfectly detailed sharp picture absolutelly free of moire and aliasing. Attached Thumbnails

February 26th, 2015, 02:15 AM	#5
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Kitchen Ivan the reason I used 50p is I wanted really slow tracking movements, my slider is a glidetrack which is an igus slider and sticks a little when sliding slowly - for a slow consistant speed I push it fairly quickly and slow it down 50% on the timeline - 25p would not allow me this

February 26th, 2015, 10:17 AM	#6
Ivan Mosny Regular Crew Join Date: Sep 2007 Location: Poland Posts: 141	Re: Kitchen Yes - i know. I would love 50P in my A7S in full frame too. But nothing is perfect. One of biggest advantages of this camera is full readout of the sensor - not possible in this mode. I love smooth slow slider movements too. For this i decided to buy the fantastic edelkrone slider with action and target module. It let me realize beuatifull movements, that are impossible manually.

February 27th, 2015, 05:43 AM	#7
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Kitchen Ivan I'm a little confused - are you saying the A7s does not use the full sensor in 50p mode? does using 50p mode engage crop sensor as in APS mode? I can't find any reference to this in the manual. Pete

February 27th, 2015, 05:49 AM	#8
Peter Corbett Major Player Join Date: Jan 2006 Location: Victoria Australia Posts: 246	Re: Kitchen You have to use crop mode if you are using 50/60P or you will get that horrendous aliasing. Or.....just shoot organic soft BG subjects that don't have a lot of fine detail. Then it works. __________________ Peter Corbett Powerhouse Productions www.php.com.au

March 10th, 2015, 06:30 AM	#10
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Kitchen Of course the downside to that is my lenses are all EF and crop when the camera is set to APS-C mode - I could use my speedbooster but that's usually attached to my EA50 and certainly during a wedding shoot don't have time to do all the juggling around.

March 13th, 2015, 07:43 AM	#11
James Redmond Regular Crew Join Date: Aug 2010 Location: Rogers, AR Posts: 86	Re: Kitchen What lens did you use? james __________________ James Redmond; Dynamic Videos, Inc. Rogers, AR USA

March 14th, 2015, 06:33 AM	#12
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Kitchen James I used a Tamron 24-70mm f2.8 - I also use Canon 24-105mm f4.0, Canon 70-20mm f2.8 and a Samyang 14mm All for full frame cameras (EF mount) Pete