Help! Thin stand of hair in OVF.

HHHkumar · 11-01-2014, 06:21 AM

Hi,
Today was changing my kit lens to pentax M 50mm f2 , which i bought a few days ago.
I was swapping the lens to evaluate the new lens & was enjoying the IQ of the dirt cheap lens of mine.

Again as i was into swapping, i started noticing a thin strand of hair in my OVF, i tried blowing air but no changes.
By visual inspection I'm not able to spot the hair.
It really worries me seeing the OVF with a hair projected into it.
Any help in this regard will be appreciated.
Is it fine to swap the lens often, with respect to the lens mount? is it harmful?
Thank you!

Last edited by HHHkumar; 11-01-2014 at 06:22 AM. Reason: Grammer

Kozlok · 11-01-2014, 06:31 AM

If you drop the focusing screen into the open position, a rocket blower will usually get rid of a hair. Beware, though. Focusing screens are very delicate. Don't touch the surface, you will scratch it.

**Kerrowdown** · 11-01-2014, 06:49 AM

Originally posted by Kozlok

a rocket blower will usually get rid of a hair

+1 aye what he said, but know exactly how you feel, it drives me nuts to when this happens.

osib · 11-01-2014, 06:53 AM

And don't worry about swapping lens. Just turn off camera and point it down, so you minimaze chance that focusing screen and sensor (what it's more important) collect the dust.

HHHkumar · 11-01-2014, 07:03 AM

Originally posted by Kozlok

If you drop the focusing screen into the open position, a rocket blower will usually get rid of a hair. Beware, though. Focusing screens are very delicate. Don't touch the surface, you will scratch it.

Thank you, will be doing the same tomorrow,
But do i have to lock up the mirror while doing so? of should i just use the blower to clean the mirror?
in btw sorry for being ignorant, where's the focus screen located, i mean just above the mirror?

LensBeginner · 11-01-2014, 08:17 AM - **1 Like**

Originally posted by HHHkumar

Thank you, will be doing the same tomorrow,
But do i have to lock up the mirror while doing so? of should i just use the blower to clean the mirror?
in btw sorry for being ignorant, where's the focus screen located, i mean just above the mirror?

Just above, yes, it's parallel to the table when you put the camera on it.
You can see it clearly in this thread:
https://www.pentaxforums.com/forums/115-pentax-k-5/142225-focus-adjustment-wa...nt-images.html

shamer · 11-01-2014, 09:24 AM

Just be aware of where you blow that hair to! A hair on the OVF is annoying, a hair on the sensor is a bigger problem...

I still have an Arctic Butterfly sensor cleaner that I bought many years ago (I've been a Pentax digital SLR user since the first days of the *ist DL) but I have to say that with the sensor cleaning features of the K-7 and K-5 models, I never use it anymore. Earlier sensor cleaning models were not very effective, though, IMHO.

Shawn

stevebrot · 11-01-2014, 10:37 AM

You should not have to drop the screen to get a hair off the bottom side. I would suggest leaving the screen where it is* and fogging the screen with your breath to dispel static charge. Then try the blower.

Steve

* If you drop the screen, that exposes three surfaces to dust, dander, pollen, and hair. Clean one surface and the other picks up something else...compound frustration...

11-01-2014, 06:21 AM	#1
HHHkumar New Member Join Date: Jul 2014 Photos: Albums Posts: 8	Help! Thin stand of hair in OVF. Hi, Today was changing my kit lens to pentax M 50mm f2 , which i bought a few days ago. I was swapping the lens to evaluate the new lens & was enjoying the IQ of the dirt cheap lens of mine. Again as i was into swapping, i started noticing a thin strand of hair in my OVF, i tried blowing air but no changes. By visual inspection I'm not able to spot the hair. It really worries me seeing the OVF with a hair projected into it. Any help in this regard will be appreciated. Is it fine to swap the lens often, with respect to the lens mount? is it harmful? Thank you! Last edited by HHHkumar; 11-01-2014 at 06:22 AM. Reason: Grammer

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11-01-2014, 06:31 AM	#2
Kozlok Pentaxian Join Date: Jun 2012 Location: Albuquerque Photos: Gallery Posts: 3,148	If you drop the focusing screen into the open position, a rocket blower will usually get rid of a hair. Beware, though. Focusing screens are very delicate. Don't touch the surface, you will scratch it.

11-01-2014, 06:49 AM	#3
Kerrowdown PEG Moderator Join Date: Aug 2008 Location: Highlands of Scotland... "Hold Infinity in the palm of your hand" - William Blake Photos: Gallery Posts: 57,864	Originally posted by Kozlok a rocket blower will usually get rid of a hair +1 aye what he said, but know exactly how you feel, it drives me nuts to when this happens.

11-01-2014, 06:53 AM	#4
osib Junior Member Join Date: Aug 2014 Posts: 38	And don't worry about swapping lens. Just turn off camera and point it down, so you minimaze chance that focusing screen and sensor (what it's more important) collect the dust.

11-01-2014, 07:03 AM	#5
HHHkumar New Member Join Date: Jul 2014 Photos: Albums Posts: 8 Original Poster	Originally posted by Kozlok If you drop the focusing screen into the open position, a rocket blower will usually get rid of a hair. Beware, though. Focusing screens are very delicate. Don't touch the surface, you will scratch it. Thank you, will be doing the same tomorrow, But do i have to lock up the mirror while doing so? of should i just use the blower to clean the mirror? in btw sorry for being ignorant, where's the focus screen located, i mean just above the mirror?

11-01-2014, 08:17 AM - 1 Like	#6
LensBeginner Veteran Member Join Date: Sep 2014 Photos: Albums Posts: 4,696	Originally posted by HHHkumar Thank you, will be doing the same tomorrow, But do i have to lock up the mirror while doing so? of should i just use the blower to clean the mirror? in btw sorry for being ignorant, where's the focus screen located, i mean just above the mirror? Just above, yes, it's parallel to the table when you put the camera on it. You can see it clearly in this thread: https://www.pentaxforums.com/forums/115-pentax-k-5/142225-focus-adjustment-wa...nt-images.html

11-01-2014, 09:24 AM	#7
shamer New Member Join Date: Nov 2008 Location: Detroit, MI Photos: Albums Posts: 24	Just be aware of where you blow that hair to! A hair on the OVF is annoying, a hair on the sensor is a bigger problem... I still have an Arctic Butterfly sensor cleaner that I bought many years ago (I've been a Pentax digital SLR user since the first days of the *ist DL) but I have to say that with the sensor cleaning features of the K-7 and K-5 models, I never use it anymore. Earlier sensor cleaning models were not very effective, though, IMHO. Shawn

11-01-2014, 10:37 AM	#8
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	You should not have to drop the screen to get a hair off the bottom side. I would suggest leaving the screen where it is* and fogging the screen with your breath to dispel static charge. Then try the blower. Steve * If you drop the screen, that exposes three surfaces to dust, dander, pollen, and hair. Clean one surface and the other picks up something else...compound frustration...