DIY Flash Telephoto/Zoom?

Athiril · 29th May 2009, 12:30 AM

Hey, got an awesome Sunak 433D

Was like $30, and got 2x 433AF's for $15 each (one also has the full to 1/16th manual power settings) and a Vivitar 3700 which, all four are GN120.

Anyway, I wouldn't mind being able to drastically zoom in one of the ones with manual power settings, for the effect of having a much greater intensity over area - fill for wild life etc.

If i made a snoot with reflective foil on the inside, would this achieve what I want?

Any third party attachments for this?

something like this I guess: http://www.birdsasart.com/accs.html#BEAMER

nisstrust · 29th May 2009, 12:36 AM

a homemade snoot sounds like a good practical idea to focus the flash in on an object at distant, try a rubber tube from bunnings or perhaps a black drainpipe as well?

Athiril · 29th May 2009, 12:41 AM

Quote:

Originally Posted by nisstrust

a homemade snoot sounds like a good practical idea to focus the flash in on an object at distant, try a rubber tube from bunnings or perhaps a black drainpipe as well?

Yeah I'll try that since its basically free

Also saw the better beamer uses fresnel sheet/lens, I think perhaps I can use magnifying sheet which should be the same thing from the cheapie store

isaaus · 29th May 2009, 1:03 AM

I reckon get a glass lens with 3-5cm diameter and put it in the end of a tube with reflective aluminium sheet lining inside the tube.

Basically you will be focusing the light into a beam, just don`t point it at airplanes.

EDIT: Okay this just came into my mind. A camera lens is meant to focus light into the sensor, it could be used in reserve. Imagine sensor being replaced with a flash, lens should project flash to the right distance with exact field of view needed.

Take an old broken/damaged slr with similar range lens you are looking for, remove everything from the body and mount the flash at the back or it comes in the spot of the film. Use the lens to zoom and apeture ring to control the intensity.

Might work and might not work at all

isaaus · 29th May 2009, 1:36 AM

DOUBLE POST!!!!!!!

occxlr8ed · 29th May 2009, 1:44 AM

Quote:

Originally Posted by it_inspector

Take an old broken/damaged slr with similar range lens you are looking for, remove everything from the body and mount the flash at the back or it comes in the spot of the film. Use the lens to zoom and apeture ring to control the intensity.

Might work and might not work at all

I've seen that done, saw someone on flickr do that! it works!

baar01 · 29th May 2009, 6:30 AM

Pringles can as a snoot works fine for me!

isaaus · 29th May 2009, 3:03 PM

Here you go Athiril. The guy made a snoot thingy out of old lens and some rubber pipe thingy.

http://www.flickr.com/photos/airchinapilot/2127771977/

Athiril · 29th May 2009, 4:10 PM

If you have a totally enclosed snoot, coated on the inside with silver reflector/aluminium foil/whatever, then would stopping a lens down attached to it reduce intensity?

Majority of the light would have to travel through still I would think.

I had a 28-80 EF... I took it apart and its in pieces

Oh well, maybe that Zuiko 65-200mm f/4

I still like the lightweight portable fresnel sheet idea.

Andres · 29th May 2009, 4:18 PM

Stick the flash in the head of a 'dolphin' torch. Should aim the light a lot better. A snoot wouldn't really to a great job of focussing the light and projecting it much further. I imagine it would rather just 'blank out' the spill light.

Alternatively to a dolphin torch, a hand held spotlight. They will captue the spilled light and focus it forward as opposed to just blocking it off.

s4Rg3 · 29th May 2009, 9:25 PM

stubby cooler works for cheap aswell

29th May 2009, 12:30 AM	#1
Athiril Member Join Date: Jun 2003 Location: Carnegie, Melbourne Posts: 3,611	DIY Flash Telephoto/Zoom? Hey, got an awesome Sunak 433D Was like $30, and got 2x 433AF's for $15 each (one also has the full to 1/16th manual power settings) and a Vivitar 3700 which, all four are GN120. Anyway, I wouldn't mind being able to drastically zoom in one of the ones with manual power settings, for the effect of having a much greater intensity over area - fill for wild life etc. If i made a snoot with reflective foil on the inside, would this achieve what I want? Any third party attachments for this? something like this I guess: http://www.birdsasart.com/accs.html#BEAMER __________________ http://www.flickr.com/photos/athiril/ 35mm, 6x7cm, 4x5" Ask me about C-41 & E-6 processing! Last edited by Athiril; 29th May 2009 at 12:34 AM.

29th May 2009, 12:36 AM	#2
nisstrust Member Join Date: Oct 2007 Location: Outbush, NT Posts: 1,264	a homemade snoot sounds like a good practical idea to focus the flash in on an object at distant, try a rubber tube from bunnings or perhaps a black drainpipe as well? __________________ “Knowledge is a single point, but the ignorant have multiplied it.”

29th May 2009, 1:03 AM	#4
isaaus Member Join Date: Aug 2006 Posts: 2,092	I reckon get a glass lens with 3-5cm diameter and put it in the end of a tube with reflective aluminium sheet lining inside the tube. Basically you will be focusing the light into a beam, just don`t point it at airplanes. EDIT: Okay this just came into my mind. A camera lens is meant to focus light into the sensor, it could be used in reserve. Imagine sensor being replaced with a flash, lens should project flash to the right distance with exact field of view needed. Take an old broken/damaged slr with similar range lens you are looking for, remove everything from the body and mount the flash at the back or it comes in the spot of the film. Use the lens to zoom and apeture ring to control the intensity. Might work and might not work at all __________________ OCAU "I Hate Bad Laptop Screens" Club - Member #0 Last edited by isaaus; 29th May 2009 at 1:38 AM.

29th May 2009, 1:36 AM	#5
isaaus Member Join Date: Aug 2006 Posts: 2,092	DOUBLE POST!!!!!!! __________________ OCAU "I Hate Bad Laptop Screens" Club - Member #0

29th May 2009, 3:03 PM	#8
isaaus Member Join Date: Aug 2006 Posts: 2,092	Here you go Athiril. The guy made a snoot thingy out of old lens and some rubber pipe thingy. http://www.flickr.com/photos/airchinapilot/2127771977/ __________________ OCAU "I Hate Bad Laptop Screens" Club - Member #0

29th May 2009, 6:30 AM	#7
baar01 Member Join Date: Apr 2004 Location: QLD Posts: 1,039	Pringles can as a snoot works fine for me!

29th May 2009, 4:10 PM	#9
Athiril Member Join Date: Jun 2003 Location: Carnegie, Melbourne Posts: 3,611	If you have a totally enclosed snoot, coated on the inside with silver reflector/aluminium foil/whatever, then would stopping a lens down attached to it reduce intensity? Majority of the light would have to travel through still I would think. I had a 28-80 EF... I took it apart and its in pieces Oh well, maybe that Zuiko 65-200mm f/4 I still like the lightweight portable fresnel sheet idea. __________________ http://www.flickr.com/photos/athiril/ 35mm, 6x7cm, 4x5" Ask me about C-41 & E-6 processing!

29th May 2009, 4:18 PM	#10
Andres Motor Admin Join Date: Aug 2004 Location: Sydney Posts: 6,715	Stick the flash in the head of a 'dolphin' torch. Should aim the light a lot better. A snoot wouldn't really to a great job of focussing the light and projecting it much further. I imagine it would rather just 'blank out' the spill light. Alternatively to a dolphin torch, a hand held spotlight. They will captue the spilled light and focus it forward as opposed to just blocking it off. __________________ His: Dell Studio XPS 13 Hers: Dell XPS M1330 HTPC: A64 x2 \| MGB LE Project Car \| 4WD Travel Blog

29th May 2009, 9:25 PM	#11
s4Rg3 Member Join Date: Jun 2002 Location: 4178, QLD Posts: 542	stubby cooler works for cheap aswell