glare: CMOS or lens? at DVinfo.net

Piotr Wozniacki · March 13th, 2007, 12:47 PM

When shooting against the (low and strong) sunshine, I'm getting glaring artefacts like in the attached snapshots. What's to blame: the CMOS chips, or the lens? If the latter, is it normal with the V1, or is my unit' lens at fault (the lens were clean)? TIA!

Chris Barcellos · March 13th, 2007, 01:07 PM

Looks like lens flare. That shape on picture 2 is the aperture iris. It is not uncommon to have this occur, in my opinion, when you have sunlight direct on your lens. I am attaching one that comes from my Sony FX1 as an example..

Doug Graham · March 13th, 2007, 01:08 PM

The second one is a pretty obvious lens flare. Almost all lenses will produce lens flares when pointed at bright light sources. It's so common that 3D animation programs like LightWave include the option to create lens flares in CGI scenes...the "defect" adds an element of realism.

The spots in the first one could also be lens flares, or could be specks of dust on the front element...not sure.

Anyway, these things look like pretty normal artifacts of optics...I would not be too quick to blame the particular camera.

Piotr Wozniacki · March 13th, 2007, 02:03 PM

Thanks for the feedback. Again, even though I agree this is normal when shooting against a bright light source, the effect was never that pronounced with the HC1 I used to have!

Douglas Spotted Eagle · March 13th, 2007, 02:26 PM

that's because the HC1 has a smaller lens, has a bigger overall/relative hood, and may be masking the flare.
Wait'll you put a wide lens on the V1 (or any other camcorder).

Mike Dunning · March 13th, 2007, 03:26 PM

Piotr - were you using any lens filters such as a UV filter?

Piotr Wozniacki · March 13th, 2007, 03:49 PM

No, Mike - nothing on the lens; why?

Stu Holmes · March 13th, 2007, 04:48 PM

...because using filters adds more reflective surfaces and can increase flare probs and also can reduce contrast.

IMO those shots exhibit entirely normal lens flare when you're shooting into the light. I don't think there's anything to be concerned about.

Dave Blackhurst · March 13th, 2007, 05:38 PM

I've taken to noticing lens flare in movies - don't know if it's added in or on the film to start with, but more than a few times I've seen it pretty much just like in your stills! I'd say it's a normal thing... perhaps even usable as and effect if you could learn to tame it!

DB>)

Brian Rhodes · March 14th, 2007, 08:21 AM

Piotr

Try using a sun shade this will reduce the flare.

Craig Irving · March 14th, 2007, 08:42 AM

Hey Brian,

Do you happen to have those pictures in a higher quality?

Brian Rhodes · March 14th, 2007, 05:33 PM

Quote:

Originally Posted by Craig Irving

Hey Brian,

Do you happen to have those pictures in a higher quality?

YES I wil repost the pictures.

Craig Irving · March 15th, 2007, 08:16 AM

Hey you've got some really useful/practical accessories.

Can you list some of those things we're seeing?
I noticed that you chose not to use the mic mount on the V1U but you're still using the supplied mic. Was that just done to reduce vibration, or was there another reason?

I'm using a Rode NT3 mounted with an SM5 shock mount but it really does add a lot of weight to the overall package. How heavy is the shock mount you're using?

That sun shade is a great idea. I noticed in a lot of Sony's promo pics for the V1U that they had a matte box on it, but it doesn't seem to be an official Sony accessory. I wonder which matte box or sun shade would fit the V1U nicely.

Brian Rhodes · March 15th, 2007, 05:36 PM

I am using a J-Rode that I modified to hold the original Sony mic and the wireless mic. The sunshade is mounted to the original Sony lens hood using a Hama flash mount. The Sun shade (purchased on Ebay) mounting shaft had to be machined to have of the original length to fit in the Hama Flash Mount. The camera light is a 50w-100w Bescor KLK-50H Light with battery pack. fully dressed I think the came is still lighter than my Z1.

Jeff Rhode · March 16th, 2007, 12:47 PM

The rig looks good Brian....I am glad The J-Rod is working out for you so well. You can check them out at www.thej-rod.com

Regards.

March 13th, 2007, 12:47 PM	#1
Piotr Wozniacki Inner Circle Join Date: Aug 2006 Location: Poland Posts: 4,086	glare: CMOS or lens? When shooting against the (low and strong) sunshine, I'm getting glaring artefacts like in the attached snapshots. What's to blame: the CMOS chips, or the lens? If the latter, is it normal with the V1, or is my unit' lens at fault (the lens were clean)? TIA! Attached Thumbnails __________________ Sony PXW-FS7 \| DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive Last edited by Piotr Wozniacki; March 13th, 2007 at 01:59 PM.

March 13th, 2007, 01:07 PM	#2
Chris Barcellos Inner Circle Join Date: Nov 2005 Location: Elk Grove CA Posts: 6,838	Looks like lens flare. That shape on picture 2 is the aperture iris. It is not uncommon to have this occur, in my opinion, when you have sunlight direct on your lens. I am attaching one that comes from my Sony FX1 as an example.. Attached Thumbnails __________________ Chris J. Barcellos

March 13th, 2007, 01:08 PM	#3
Doug Graham Video Bear Join Date: Jan 2002 Location: Stafford, VA, USA Posts: 45	The second one is a pretty obvious lens flare. Almost all lenses will produce lens flares when pointed at bright light sources. It's so common that 3D animation programs like LightWave include the option to create lens flares in CGI scenes...the "defect" adds an element of realism. The spots in the first one could also be lens flares, or could be specks of dust on the front element...not sure. Anyway, these things look like pretty normal artifacts of optics...I would not be too quick to blame the particular camera. __________________ Regards, Doug Graham

March 13th, 2007, 02:03 PM	#4
Piotr Wozniacki Inner Circle Join Date: Aug 2006 Location: Poland Posts: 4,086	Thanks for the feedback. Again, even though I agree this is normal when shooting against a bright light source, the effect was never that pronounced with the HC1 I used to have! __________________ Sony PXW-FS7 \| DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive

March 13th, 2007, 02:26 PM	#5
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	that's because the HC1 has a smaller lens, has a bigger overall/relative hood, and may be masking the flare. Wait'll you put a wide lens on the V1 (or any other camcorder). __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

March 13th, 2007, 03:26 PM	#6
Mike Dunning New Boot Join Date: Jan 2007 Location: New Orleans, LA Posts: 12	Piotr - were you using any lens filters such as a UV filter?

March 13th, 2007, 03:49 PM	#7
Piotr Wozniacki Inner Circle Join Date: Aug 2006 Location: Poland Posts: 4,086	No, Mike - nothing on the lens; why? __________________ Sony PXW-FS7 \| DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive

March 13th, 2007, 04:48 PM	#8
Stu Holmes Major Player Join Date: May 2005 Location: Europe Posts: 844	...because using filters adds more reflective surfaces and can increase flare probs and also can reduce contrast. IMO those shots exhibit entirely normal lens flare when you're shooting into the light. I don't think there's anything to be concerned about.

March 13th, 2007, 05:38 PM	#9
Dave Blackhurst Inner Circle Join Date: Feb 2007 Location: Apple Valley CA Posts: 4,874	I've taken to noticing lens flare in movies - don't know if it's added in or on the film to start with, but more than a few times I've seen it pretty much just like in your stills! I'd say it's a normal thing... perhaps even usable as and effect if you could learn to tame it! DB>)

March 14th, 2007, 08:21 AM	#10
Brian Rhodes Major Player Join Date: Nov 2005 Location: Houston, Texas Posts: 753	Piotr Try using a sun shade this will reduce the flare. Attached Images

March 14th, 2007, 08:42 AM	#11
Craig Irving Major Player Join Date: Jun 2006 Location: Toronto Posts: 539	Hey Brian, Do you happen to have those pictures in a higher quality?

March 15th, 2007, 08:16 AM	#13
Craig Irving Major Player Join Date: Jun 2006 Location: Toronto Posts: 539	Hey you've got some really useful/practical accessories. Can you list some of those things we're seeing? I noticed that you chose not to use the mic mount on the V1U but you're still using the supplied mic. Was that just done to reduce vibration, or was there another reason? I'm using a Rode NT3 mounted with an SM5 shock mount but it really does add a lot of weight to the overall package. How heavy is the shock mount you're using? That sun shade is a great idea. I noticed in a lot of Sony's promo pics for the V1U that they had a matte box on it, but it doesn't seem to be an official Sony accessory. I wonder which matte box or sun shade would fit the V1U nicely.

March 15th, 2007, 05:36 PM	#14
Brian Rhodes Major Player Join Date: Nov 2005 Location: Houston, Texas Posts: 753	I am using a J-Rode that I modified to hold the original Sony mic and the wireless mic. The sunshade is mounted to the original Sony lens hood using a Hama flash mount. The Sun shade (purchased on Ebay) mounting shaft had to be machined to have of the original length to fit in the Hama Flash Mount. The camera light is a 50w-100w Bescor KLK-50H Light with battery pack. fully dressed I think the came is still lighter than my Z1.

March 16th, 2007, 12:47 PM	#15
Jeff Rhode Regular Crew Join Date: Jun 2006 Location: NJ, USA Posts: 169	The rig looks good Brian....I am glad The J-Rod is working out for you so well. You can check them out at www.thej-rod.com Regards. Last edited by Jeff Rhode; March 17th, 2007 at 02:47 AM.