Where can I buy lens felt?

**geomez** · 01-05-2015, 01:12 PM

Hello,

I'm looking to buy some of the felt used to line metal lens caps. It's also on the insides of Pentax Ltd lens hoods.
I went to a couple of regular fabric stores but the closest thing I could find was velour, which is similar, but not what I want.
I'm attempting to line the inside of my deglassed teleconverter for an auto extension tube. The tube is creates functional macros, but flares like crazy.
I actually lined it with the velour and much of the flare is gone. Just by looking at the velour, it seems to reflect more light than the lens fabric, hence my desire to buy some and try it out.

mrNewt · 01-05-2015, 01:28 PM

I think you would be better off with coating the inside of the tube with some matte black paint.

wombat2go · 01-05-2015, 01:37 PM

Protostar Telescope Making & Upgrading

This self adhesive telescope flocking is really black, of lower reflectivity than Krylon Camo Matt black.

The downside of flock is that particles of lint attach to it, it might need vacuum cleaning occasionally

**dms** · 01-05-2015, 02:10 PM

Edmondsoptics:http://www.edmundoptics.com/lab-production/general-tools/light-absorbing-bla...-material/1502
Believe it is often called flocking material. BTW I have not ordered from Edmonds their flocking material.

stevebrot · 01-05-2015, 03:20 PM

Micro-tools might also have what you need:

Light Baffle

A hobby shop catering to model train and/or doll house modelers might also be a good source.

Steve

aleonx3 · 01-05-2015, 03:24 PM

I would use a strip of leather (cut from old-torn leather wallet) and use it as lining (turning inside out) for metal lens cap.

wombat2go · 01-05-2015, 04:04 PM

Originally posted by dcshooter

The telescope flocking really isn't going to buy any noticebale advantage over the Matte black. I've tested it against the Rustoleum version of the matte paint wombat mentions, and there is no noticeable difference in performance between the two in real world shooting.

Hi, DC,
There is a big difference between brushed Rustoleum Flat Black (outer rectangle) and Protostar flocking ( inner annulus)
I took this photo with the ring flash to get maximum bounce for a measurement in Gimp

The Rustoleum brightness is 30/255 while the Protostar flock is only 7/255

The Krylon is not as low reflectivity as the brushed Rustoleum but sometimes is easier to apply.
(The Vegemite has not been measured, I love it for breakfast)

Attached Images

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Obin Robinson · 01-05-2015, 04:38 PM

Originally posted by wombat2go

Protostar Telescope Making & Upgrading

This self adhesive telescope flocking is really black, of lower reflectivity than Krylon Camo Matt black.

The downside of flock is that particles of lint attach to it, it might need vacuum cleaning occasionally

There have been some serious issues with Protostar customer service. I suggest that anyone looking for flocking go to scopestuff. I've used his material many times and he delivers quick.

ScopeStuff

obin

**csa** · 01-05-2015, 05:24 PM

Originally posted by Obin Robinson

There have been some serious issues with Protostar customer service. I suggest that anyone looking for flocking go to scopestuff. I've used his material many times and he delivers quick.

ScopeStuff

obin

That is absolutely correct. In the astronomy world Protostar has been noted for serious issues with customer service. I've dealt with ScopeStuff many times, with nothing but excellent, quick service!

wombat2go · 01-05-2015, 05:52 PM

Originally posted by dcshooter

but extension tubes for macrophotography are exactly the opposite - a classic highly lit scenario where the minimal difference in reflectivity between the paint and the flocking will least matter, since the obvious problems sought to be avoided are caused by the specularity of the light rather than its intensity.

Hi DC, I have nearly used up the Krylon matt black, so next time I will try the Rustoleum spray paint you mention.

Here is a test of the bore of a macro tube I made for the 4x5 Speed Graphic.

The bore was originally painted with the Krylon Matt Black spray.

I stuck a little rectangle of flock in the bore to compare the low angle specular reflection of the two surfaces.

Photographed using the Pentax - m macro f/4 100mm at iso 400, f/32 and 1/15th
Results:
The source, CFL lamp is almost RGB 255,255,255 in the bright spots

The reflection off the Paint: RGB 255,157,74

The reflection off the Flock: 16,7,4

bobD · 01-06-2015, 02:19 PM

A word of warning on flocking !!.

No matter how it is applied some always come loose. As it, and its adhesive, ages more comes loose.

Loose flock and any adhesive on it is quickly attracted to the electostaticaly charged sensor in your dslr.
You get the most humungous dust bunnies and where it touches with any adhesive the resulting mess will reduce you to tears.
https://www.pentaxforums.com/forums/43-gatherings-events-groups/41021-kiwi-pe...ml#post2938784

https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/253765-d...o-m100-f4.html

The leather idea posted earlier is most appreciated.. thankyou.!

01-05-2015, 01:12 PM	#1
geomez Site Supporter Join Date: Mar 2013 Location: Roanoke, Virginia, USA Photos: Gallery Posts: 1,760	Where can I buy lens felt? Hello, I'm looking to buy some of the felt used to line metal lens caps. It's also on the insides of Pentax Ltd lens hoods. I went to a couple of regular fabric stores but the closest thing I could find was velour, which is similar, but not what I want. I'm attempting to line the inside of my deglassed teleconverter for an auto extension tube. The tube is creates functional macros, but flares like crazy. I actually lined it with the velour and much of the flare is gone. Just by looking at the velour, it seems to reflect more light than the lens fabric, hence my desire to buy some and try it out.

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01-05-2015, 01:28 PM	#2
mrNewt Veteran Member Join Date: Nov 2011 Location: ON, RH Posts: 2,181	I think you would be better off with coating the inside of the tube with some matte black paint.

01-05-2015, 01:37 PM	#3
wombat2go Veteran Member Join Date: Jan 2010 Location: Michigan Photos: Gallery Posts: 2,207	Protostar Telescope Making & Upgrading This self adhesive telescope flocking is really black, of lower reflectivity than Krylon Camo Matt black. The downside of flock is that particles of lint attach to it, it might need vacuum cleaning occasionally

01-05-2015, 02:10 PM	#4
dms Site Supporter Join Date: Aug 2011 Location: New York, NY Photos: Gallery Posts: 2,192	Edmondsoptics:http://www.edmundoptics.com/lab-production/general-tools/light-absorbing-bla...-material/1502 Believe it is often called flocking material. BTW I have not ordered from Edmonds their flocking material.

01-05-2015, 03:20 PM	#5
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Micro-tools might also have what you need: Light Baffle A hobby shop catering to model train and/or doll house modelers might also be a good source. Steve

01-05-2015, 03:24 PM	#6
aleonx3 Veteran Member Join Date: Jul 2007 Location: Brampton, Ontario Photos: Gallery \| Albums Posts: 3,996	I would use a strip of leather (cut from old-torn leather wallet) and use it as lining (turning inside out) for metal lens cap.

01-05-2015, 04:38 PM	#8
Obin Robinson Senior Member Join Date: Nov 2014 Photos: Albums Posts: 272	Originally posted by wombat2go Protostar Telescope Making & Upgrading This self adhesive telescope flocking is really black, of lower reflectivity than Krylon Camo Matt black. The downside of flock is that particles of lint attach to it, it might need vacuum cleaning occasionally There have been some serious issues with Protostar customer service. I suggest that anyone looking for flocking go to scopestuff. I've used his material many times and he delivers quick. ScopeStuff obin

01-05-2015, 05:24 PM	#9
csa Loyal Site Supporter Join Date: Aug 2014 Location: Montana mountains Posts: 10,133	Originally posted by Obin Robinson There have been some serious issues with Protostar customer service. I suggest that anyone looking for flocking go to scopestuff. I've used his material many times and he delivers quick. ScopeStuff obin That is absolutely correct. In the astronomy world Protostar has been noted for serious issues with customer service. I've dealt with ScopeStuff many times, with nothing but excellent, quick service!

01-06-2015, 02:19 PM	#11
bobD Pentaxian Join Date: Nov 2008 Location: Waikikamukau Photos: Albums Posts: 1,248	A word of warning on flocking !!. No matter how it is applied some always come loose. As it, and its adhesive, ages more comes loose. Loose flock and any adhesive on it is quickly attracted to the electostaticaly charged sensor in your dslr. You get the most humungous dust bunnies and where it touches with any adhesive the resulting mess will reduce you to tears. https://www.pentaxforums.com/forums/43-gatherings-events-groups/41021-kiwi-pe...ml#post2938784 https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/253765-d...o-m100-f4.html The leather idea posted earlier is most appreciated.. thankyou.!