Sample A1 Footage at DVinfo.net

Richard Hunter · December 10th, 2006, 05:09 AM

Here's a short clip I shot using the DISJECTA custom preset. 2 things stand out for me-

1 The Canon lens distorts quite a lot at the wide settings (the cable car pillar at the beginning is actually vertical and yes my tripod was levelled)

2 The DISJECTA preset gives larger than life colours on a sunny day! I will probably tone down the saturation in future. It's a glorious image though.

Richard

http://www.jaegercat.com/~richard/SentosaCableCars.wmv

John Huling · December 10th, 2006, 05:56 AM

That "keystoning" distortion looks terrible.I will have to do some tests myself on that type of subject material. Other wise looks good.

Andrew Ott · December 11th, 2006, 09:35 PM

It is download at 15 kb/s. Is it on your server's end?

Richard Hunter · December 11th, 2006, 09:43 PM

Hi Andrew. I think the server is very slow sometimes. Sorry about that but it's all I have available.

Richard

John Huling · December 12th, 2006, 05:44 AM

There is quite a bit of keystone distortion at full wide on the XH A1. Don't know what to think. Has anyone used Canon's wide-adapter? I have never used lens adapters. Is the barrel/pincushion distortion worse?

Richard Hunter · December 12th, 2006, 06:36 PM

Quote:

Originally Posted by John Huling

There is quite a bit of keystone distortion at full wide on the XH A1. Don't know what to think. Has anyone used Canon's wide-adapter? I have never used lens adapters. Is the barrel/pincushion distortion worse?

Hi John. I have a CO 0.7X converter that I bought for my XL2, and modified it to fit on the A1. However, I haven't actually shot any footage with it yet on the A1, because the standard lens is already quite a bit wider than the XL2 lens and I don't feel the same need to fit the converter. When used with the XL2, this converter does show barrel distortion at the wide end, but I still found it very useable most of the time. Depends on whether there are vertical lines in the shot I suppose.

Richard

Donald White · December 12th, 2006, 08:32 PM

Andrew - I'm pulling it down @ 100+ kb per sec.

John Huling · December 15th, 2006, 11:44 AM

Thanks for the info! I love it wide and close.

Richard Hunter · December 16th, 2006, 03:59 AM

John, I did some stillshots with and without the CO 0.7X WA Adapter. I was actually trying to check out the keystone distortion in my sample clip, but thought I'd include the WA for comparison purposes since you mentioned it.

I took 2 shots at full wide angle with and without the adapter fitted, and also at a not so wide angle obtained by turning the zoom ring 3 notches. Don't know what the exact setting was, but I made sure to not disturb it while I removed the adapter.

Here's a couple of comments from what I see in these pictures. Others are free to chime in.

First, the distortion in the basic lens is barrel distortion, and is not bad considering how wide it goes. the keystoning of the original sample clip could be due mainly to the composition of the shot as I was well below the cable car tower and peering up at an angle.

Second, by zooming in slightly, i.e. not using the full wide angle the lens is capable of, the barrel distortion reduces very quickly.

Finally, the WA Adapter, although it increases the barrel distortion and has obvious CA, does not drop as much resolution as you might expect from an SD lens. I consider the modification to make it fit on the XH-A1 to be time well spent and will be happy to keep on using it where necessary.

Richard

John Huling · December 22nd, 2006, 05:43 AM

Richard
Thise were very revealing shots. Backing off the full wide does seem to make a significant difference in the distortion. I shoot product stuff (stills) and I am making the transition to video as part of what I will offer. So this kind of detail helps me. Thanks

Richard Hunter · December 22nd, 2006, 07:32 PM

Hi John. I should really have mentioned it before. Just in case it's not obvious to everybody, when I adjusted the zoom I moved the tripod to compensate, to get roughly the same framing. That's why the image size isn't changing much.

Richard

Richard Hunter · January 14th, 2007, 04:51 AM

I moved the cable cars file to a different server. Hopefully the download time will be shorter.

http://www.jaegersing.com/SentosaCableCars.wmv

December 10th, 2006, 05:09 AM	#1
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	Sample A1 Footage Here's a short clip I shot using the DISJECTA custom preset. 2 things stand out for me- 1 The Canon lens distorts quite a lot at the wide settings (the cable car pillar at the beginning is actually vertical and yes my tripod was levelled) 2 The DISJECTA preset gives larger than life colours on a sunny day! I will probably tone down the saturation in future. It's a glorious image though. Richard http://www.jaegercat.com/~richard/SentosaCableCars.wmv

December 16th, 2006, 03:59 AM	#9
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	John, I did some stillshots with and without the CO 0.7X WA Adapter. I was actually trying to check out the keystone distortion in my sample clip, but thought I'd include the WA for comparison purposes since you mentioned it. I took 2 shots at full wide angle with and without the adapter fitted, and also at a not so wide angle obtained by turning the zoom ring 3 notches. Don't know what the exact setting was, but I made sure to not disturb it while I removed the adapter. Here's a couple of comments from what I see in these pictures. Others are free to chime in. First, the distortion in the basic lens is barrel distortion, and is not bad considering how wide it goes. the keystoning of the original sample clip could be due mainly to the composition of the shot as I was well below the cable car tower and peering up at an angle. Second, by zooming in slightly, i.e. not using the full wide angle the lens is capable of, the barrel distortion reduces very quickly. Finally, the WA Adapter, although it increases the barrel distortion and has obvious CA, does not drop as much resolution as you might expect from an SD lens. I consider the modification to make it fit on the XH-A1 to be time well spent and will be happy to keep on using it where necessary. Richard Attached Thumbnails

December 10th, 2006, 05:56 AM	#2
John Huling Regular Crew Join Date: Nov 2006 Location: USA Posts: 172	That "keystoning" distortion looks terrible.I will have to do some tests myself on that type of subject material. Other wise looks good.

December 11th, 2006, 09:35 PM	#3
Andrew Ott Regular Crew Join Date: Oct 2006 Location: Austin, Texas Posts: 62	It is download at 15 kb/s. Is it on your server's end?

December 11th, 2006, 09:43 PM	#4
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	Hi Andrew. I think the server is very slow sometimes. Sorry about that but it's all I have available. Richard

December 12th, 2006, 05:44 AM	#5
John Huling Regular Crew Join Date: Nov 2006 Location: USA Posts: 172	There is quite a bit of keystone distortion at full wide on the XH A1. Don't know what to think. Has anyone used Canon's wide-adapter? I have never used lens adapters. Is the barrel/pincushion distortion worse?

December 12th, 2006, 08:32 PM	#7
Donald White Regular Crew Join Date: Apr 2006 Location: Santa Fe, NM Posts: 54	Andrew - I'm pulling it down @ 100+ kb per sec.

December 15th, 2006, 11:44 AM	#8
John Huling Regular Crew Join Date: Nov 2006 Location: USA Posts: 172	Thanks for the info! I love it wide and close.

December 22nd, 2006, 05:43 AM	#10
John Huling Regular Crew Join Date: Nov 2006 Location: USA Posts: 172	Richard Thise were very revealing shots. Backing off the full wide does seem to make a significant difference in the distortion. I shoot product stuff (stills) and I am making the transition to video as part of what I will offer. So this kind of detail helps me. Thanks

December 22nd, 2006, 07:32 PM	#11
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	Hi John. I should really have mentioned it before. Just in case it's not obvious to everybody, when I adjusted the zoom I moved the tripod to compensate, to get roughly the same framing. That's why the image size isn't changing much. Richard

January 14th, 2007, 04:51 AM	#12
Richard Hunter Trustee Join Date: Dec 2004 Location: Lipa City Batangas, Philippines Posts: 1,110	I moved the cable cars file to a different server. Hopefully the download time will be shorter. http://www.jaegersing.com/SentosaCableCars.wmv