Depth of field on A1u?

Michael Stowe · May 23rd, 2006, 12:55 PM

Quote:

Originally Posted by Nick Outram

Hi,

I have been experimenting with my HC1 modes and find that the 'Portrait' mode can be used to reduce DOF. I suspect it simply opens up the Iris to the lowest 'F' value allowed for the given lighting conditions. Conversely there is a 'Landscape' mode that may work to increase DOF although I have not tested this. I have a Canon SLR and it has similiar functions. For the HC1 it is explained on page 44 of the user manual.

[For shallow DOF: In brighter light I would add a couple of ND filters onto the front. I have found the optimum background blur to be achieved by zooming in at least half way on the slider -and ideally as much as possible- and placing the subject 1/3 distance to background...]

Finally, here is an online DOF calculator to have a play with:

http://www.dofmaster.com/dofjs.html

Regards, Nick.

You are correct on both modes. Landscape and nighttime also focus basically on infinity so do not use them for anything close up.

Joff B. Rein · May 24th, 2006, 05:33 AM

here some photo's of the letus-adapter on the hc1

http://www.streamload.com/xid/RIMG0001s.JPG

http://www.streamload.com/xid/RIMG0006s.JPG

http://www.streamload.com/xid/RIMG0008s.JPG

Nick Outram · May 24th, 2006, 07:58 AM

Wow! That IS a cool piece of kit. I have heard of people making home-brew adapters but this looks good and for $300 !! Where's my cheque book!!!

I would be interested to see the results you are getting with this -even some still frames would be great/adequate.

Also, you lose what, 1.5 stops of light? Have you found it an issue?

What lenses are you using on the front? (Do you use a prime / zoom or can you use the camera zoom?)

Sorry, many questions, v. excited!

Floris van Eck · May 24th, 2006, 09:24 AM

It looks very nice. There are two setups: the normal one and the flip version. With the normal version, you need to flip the image in post, with the flip version, your image is flipped for you so your viewfinder and lcd have a normal image. You lose around 1,5 stops of light, depending on the lens you use.

You cannot use the camera zoom as you are zooming/focussing on a groundglass image so your camera focus/zoom needs to stay put. You focus/zoom with the 35mm lens. You can however change the aparture with the camera and the lens, but the lens will be the most convenient.

I do not own this lens, but this is what I was told.

Nick Outram · May 24th, 2006, 11:33 AM

Oh I forgot to ask: which type/make of lenses can you fit?

(I have a range of Canon SLR lenses, that would be ideal...hopes for good news!)

Heath McKnight · May 31st, 2006, 12:05 PM

Opening the iris to let in more light gives the image a more shallow depth of field.

heath

May 24th, 2006, 05:33 AM	#32
Joff B. Rein New Boot Join Date: Jul 2005 Location: Amsterdam Holland Posts: 15	setup adapter here some photo's of the letus-adapter on the hc1 http://www.streamload.com/xid/RIMG0001s.JPG http://www.streamload.com/xid/RIMG0006s.JPG http://www.streamload.com/xid/RIMG0008s.JPG __________________ digit

May 24th, 2006, 07:58 AM	#33
Nick Outram Regular Crew Join Date: Sep 2005 Posts: 90	Cool kit Wow! That IS a cool piece of kit. I have heard of people making home-brew adapters but this looks good and for $300 !! Where's my cheque book!!! I would be interested to see the results you are getting with this -even some still frames would be great/adequate. Also, you lose what, 1.5 stops of light? Have you found it an issue? What lenses are you using on the front? (Do you use a prime / zoom or can you use the camera zoom?) Sorry, many questions, v. excited!

May 24th, 2006, 11:33 AM	#35
Nick Outram Regular Crew Join Date: Sep 2005 Posts: 90	Which lenses Oh I forgot to ask: which type/make of lenses can you fit? (I have a range of Canon SLR lenses, that would be ideal...hopes for good news!)

May 31st, 2006, 12:05 PM	#36
Heath McKnight MPS Digital Studios Join Date: Apr 2003 Location: Palm Beach County, Florida Posts: 8,531	Opening the iris to let in more light gives the image a more shallow depth of field. heath __________________ My Final Cut Pro X blog

May 24th, 2006, 09:24 AM	#34
Floris van Eck Major Player Join Date: Jan 2006 Location: The Netherlands Posts: 993	It looks very nice. There are two setups: the normal one and the flip version. With the normal version, you need to flip the image in post, with the flip version, your image is flipped for you so your viewfinder and lcd have a normal image. You lose around 1,5 stops of light, depending on the lens you use. You cannot use the camera zoom as you are zooming/focussing on a groundglass image so your camera focus/zoom needs to stay put. You focus/zoom with the 35mm lens. You can however change the aparture with the camera and the lens, but the lens will be the most convenient. I do not own this lens, but this is what I was told.