sharpness & 30 shutter at DVinfo.net

Mo Zee · September 3rd, 2003, 10:49 PM

I recently shot an MTV on 30 shutter. As with my previous shoots, it worked well on the 16X lens.

However, it blurred the image on the 3X lens when at the widest.

At first I though it was the lens UV coating, because it was full of scratches. When I turned the effect (30 shutter) off, sharpness was ok.

Any thoughts on this?

Jeff Donald · September 5th, 2003, 04:25 AM

I'm not sure i understand your post. I'd like to try and help, but can you explain your difficulties in greater detail and/or post some stills.

Mo Zee · September 10th, 2003, 04:10 AM

Hi Jeff. I was waiting for my account to be activated, that's why I couldn't reply. For some reason, I can't attach pix.

But basically my problem was that I lost detail no matter how I focus when I was using 30 shutter- ONLY on the 3X lens. This was the case even when I was at the widest focal length.

The UV coating was badly scratched, and at first I thought that was the culprit. Then, when i had to restart the cam, the 30 shutter turned off, then resolution increased. I turned the 30 shutter on again, and it looked defocused. I tried to change focus and there was no improvement. I was basically shooting with no gain, fiters, around 5.6 opening.

Jeff Donald · September 10th, 2003, 09:52 PM

The forums don't support pictures. You need to host them yourself or you can email them to me.

Don Palomaki · September 11th, 2003, 04:45 AM

Sharpness in the vertical or horizontal direction?

Mo Zee · September 11th, 2003, 06:58 AM

I'm not sure, but I'd say both because it's not similar to loss due to deinterlacing. I'll post a link with some frames when I get back- coz I'm leaving the country tomorrow.

Rob Lohman · September 11th, 2003, 08:48 AM

What do you mean with "30 shutter turned off".. You can't turn
off the shutter. Only set it at a different speed.

Jean-Philippe Archibald · September 11th, 2003, 09:15 AM

XL1s Shutter speed can be set to anything between 1/8 to 1/15000. The XL1 can only set the shutter speed between 1/60 to 1/15000. 1/8, 1/15 and 1/30 setting must be selected in the digital effects by pressing the D.EFFECT SELLECT Button (p.35 of the english manual).

Mo Zee is right, on the XL1 , 30 shutter speed can be turned off.

Mo Zee · November 3rd, 2003, 03:19 AM

although long overdue, here is the link to a frame. I couldn't find the raw footage, so this is from the final video. sorry, I don't have 60 shutter for comparison.

http://www.geocities.com/moiseszee/cris.tif

i edited a video recently, which, according to the cameraman, used the exact wide lens that i used. He shot the whole thing 30 shutter, and accidentally shot one take with the 30 shutter off. it had a marked improvement in both contrast and sharpness. i have a feeling it has something to do with the scratched coating of the lens, but, again- why does the 30 shutter make it more obvious?

Rob Lohman · November 11th, 2003, 06:27 PM

I don't think the image is bad. Increasing shutter might help.

September 3rd, 2003, 10:49 PM	#1
Mo Zee Regular Crew Join Date: Jan 2002 Location: manila, philippines Posts: 102	sharpness & 30 shutter I recently shot an MTV on 30 shutter. As with my previous shoots, it worked well on the 16X lens. However, it blurred the image on the 3X lens when at the widest. At first I though it was the lens UV coating, because it was full of scratches. When I turned the effect (30 shutter) off, sharpness was ok. Any thoughts on this?

September 5th, 2003, 04:25 AM	#2
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	I'm not sure i understand your post. I'd like to try and help, but can you explain your difficulties in greater detail and/or post some stills. __________________ Jeff Donald Carpe Diem Search DVinfo.net for quick answers \| Where to Buy? From the best in the business: DVinfo.net sponsors

September 10th, 2003, 09:52 PM	#4
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	The forums don't support pictures. You need to host them yourself or you can email them to me. __________________ Jeff Donald Carpe Diem Search DVinfo.net for quick answers \| Where to Buy? From the best in the business: DVinfo.net sponsors

September 11th, 2003, 04:45 AM	#5
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,487	Sharpness in the vertical or horizontal direction? __________________ dpalomaki@dspalomaki.com

September 11th, 2003, 08:48 AM	#7
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	What do you mean with "30 shutter turned off".. You can't turn off the shutter. Only set it at a different speed. __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

September 10th, 2003, 04:10 AM	#3
Mo Zee Regular Crew Join Date: Jan 2002 Location: manila, philippines Posts: 102	Hi Jeff. I was waiting for my account to be activated, that's why I couldn't reply. For some reason, I can't attach pix. But basically my problem was that I lost detail no matter how I focus when I was using 30 shutter- ONLY on the 3X lens. This was the case even when I was at the widest focal length. The UV coating was badly scratched, and at first I thought that was the culprit. Then, when i had to restart the cam, the 30 shutter turned off, then resolution increased. I turned the 30 shutter on again, and it looked defocused. I tried to change focus and there was no improvement. I was basically shooting with no gain, fiters, around 5.6 opening.

September 11th, 2003, 06:58 AM	#6
Mo Zee Regular Crew Join Date: Jan 2002 Location: manila, philippines Posts: 102	I'm not sure, but I'd say both because it's not similar to loss due to deinterlacing. I'll post a link with some frames when I get back- coz I'm leaving the country tomorrow.

September 11th, 2003, 09:15 AM	#8
Jean-Philippe Archibald Trustee Join Date: Sep 2003 Location: Saguenay, Québec, Canada Posts: 1,051	Shutter speed on XL1 vs XL1s XL1s Shutter speed can be set to anything between 1/8 to 1/15000. The XL1 can only set the shutter speed between 1/60 to 1/15000. 1/8, 1/15 and 1/30 setting must be selected in the digital effects by pressing the D.EFFECT SELLECT Button (p.35 of the english manual). Mo Zee is right, on the XL1 , 30 shutter speed can be turned off. __________________ Jean-Philippe Archibald http://www.jparchibald.com - http://www.vimeo.com/jparchib

November 3rd, 2003, 03:19 AM	#9
Mo Zee Regular Crew Join Date: Jan 2002 Location: manila, philippines Posts: 102	although long overdue, here is the link to a frame. I couldn't find the raw footage, so this is from the final video. sorry, I don't have 60 shutter for comparison. http://www.geocities.com/moiseszee/cris.tif i edited a video recently, which, according to the cameraman, used the exact wide lens that i used. He shot the whole thing 30 shutter, and accidentally shot one take with the 30 shutter off. it had a marked improvement in both contrast and sharpness. i have a feeling it has something to do with the scratched coating of the lens, but, again- why does the 30 shutter make it more obvious?

November 11th, 2003, 06:27 PM	#10
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	I don't think the image is bad. Increasing shutter might help. __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors