GWTW Forum

Kite Land Talk => Website Discussion => Topic started by: Zeke on March 02, 2012, 04:22 AM



Title: Spiratone Ultratel lens
Post by: Zeke on March 02, 2012, 04:22 AM
I have a 500mm with haze on the mirror. anyone have any idea as to how it can be disassembled? 


Title: Re: Spiratone Ultratel lens
Post by: indigo_wolf on March 02, 2012, 06:52 AM
Spiratone didn't make their own lens.  They were generally rebadged Sigmas, Tokinas, Kirons, etc.

Is the haze from moisture?  If so, I would consider sealing up the lens with a couple of desiccant packs.

Otherwise, you might want to contact Sigma (http://www.sigmaphoto.com/service-support)

ATB,
Sam



Title: Re: Spiratone Ultratel lens
Post by: chilese on March 02, 2012, 10:42 AM
You can do a quick test to tell if the haze is from moisture.

Look at a known light source when the lens is cool or cold.

Warm the lens up by putting it in sunlight.

Look at the same light source now that the lens is warm.

If the haze is reduced or gone, you probably have moisture inside the body.

Not a foolproof test, more of an indicator. Some hazes can exhibit similar traits.

In general, keeping your lenses warm and dry is a good idea.

Water always deposits on the coldest surfaces first.

Keep your camera and lens inside your jacket against your body until you shoot on cold days.


Title: Re: Spiratone Ultratel lens
Post by: indigo_wolf on March 02, 2012, 12:13 PM
If you decide to attempt it yourself (all caveats apply), see if this helps:

http://forum.manualfocus.org/viewtopic.php?id=14179 (http://forum.manualfocus.org/viewtopic.php?id=14179)

Would try to verify and correct haze from moisture/condensation first.

ATB,
Sam


Title: Re: Spiratone Ultratel lens
Post by: madhabitz on March 02, 2012, 12:53 PM
Can't say I blame the techs for not giving over cleaning how-to information. They'd end up spending a ton of time tutoring you and if you messed up, you might blame them for it. Not that *you* would do that, but I can see where it might not be a chance the techs are willing to take. $100 seems like a lot of money, but in the grand scheme of things it's not a huge amount of money for a couple hours of their time.

The thread link Sam posted appears to be a good one (he's a better link hunter than I!). Be aware, the haze might actually be a fungus. If you can get to it, use some kind of anti-fungal to kill it so it won't grow back.

Good luck!

Nancy


Title: Re: Spiratone Ultratel lens
Post by: Allen Carter on March 03, 2012, 12:55 PM
A 135 F2.0 is a helluva lens. Professional cleaning and adjustment would be well worth the cost.


Title: Re: Spiratone Ultratel lens
Post by: c2thew on March 04, 2012, 11:28 PM
Diassembling a lens of that design isn't too hard if you want to try taking a stab at it. It definitely does sound like fungus which can be easily wiped off depending on how much concentration is on the lens.  If it looks light, then it probably is a light fungus and hasn't etched the coating of the glass.  if it looks thick, then chances are it has done damage to the coating/glass.

Just a word of caution though if you do decide to open it up, make sure you remember to mark where the lens comes out in contact with the body.  If it has a threaded attachment, you can reattach the lens together but the focus markings might not be lined up properly with the marker.  you might also have incorrect infinity focusing.

if you do decide to open it up, use lens paper to clean the glass and also a rubber glove to prevent the skin from your hand onto the inner parts of the glass.

my 2 cents!  haven't tried a spiratone or nikon 135mm f2 lens though


Title: Re: Re: Spiratone Ultratel lens
Post by: obijuankenobe on March 07, 2012, 08:19 AM
A 135 F2.0 is a helluva lens. Professional cleaning and adjustment would be well worth the cost.


Right??

Provided you can keep it tidy...for sure.

Sent from a long time ago...in a galaxy far, far away.