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Binoculars, pentax 10x50 pcf v central focusing ring does not operate. how do i unlock it or get it to focus?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 26 Answers

SOURCE: Binocular focus issue

you are right the prisms have probably shifted and it needs to be realigned, cost to realign for that model would cost about 35.00 plus shipping, if i can help any further please call 5088331232...larry

Posted on Jun 22, 2009

  • 26 Answers

SOURCE: focus knob problem

have repaired a few of these ...some whells have tiny set screws to tighten, some are a two piece wheel that loosens up sometimes, if not that then it is broken. if i can be of further help...15088331232

Posted on Jun 29, 2009

  • 73 Answers

SOURCE: Double Vision Pentax 10x50 PCF III

If you have double vision it is out of collimation (alignment of the optical axis). You need to send this to the manufacturer for repair.

Posted on Jul 31, 2009

  • 32 Answers

SOURCE: unable to focus my Bushnell 7x35 insta-vision binoculars

insta-vision bino's are self focusing no adjustments.

Posted on Nov 02, 2009

Sylvesterix
  • 21 Answers

SOURCE: IN AUTO FOCUS FOCUS RING STICKS MAKES NOISE LIKE

How new is the lens? In or out of warranty? If out or warranty most likely solution is to find a Sigma authorized repair shop because your description sounds like the auto-focus motor gear has failed. If in warranty, check out Sigmaphoto.com for repair sites and also download the SIGMA_SERVICE_REQUEST.PDF. I've only had to deal with Sigma once on warranty matter and they were very helpful, provided UPS authorization for shipping on their nickel.

Posted on Oct 16, 2010

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1 Answer

I got a bino set Pentax 10X50 PCF WPII the right eyepiece came off. Can you fix? Thanks John


Fixya is not a repair facility. Contact your local optical repair workshop, or Pentax direct.

Nov 15, 2016 | Pentax Optics

1 Answer

I have a pair of pentax 10x42 DCF HRc binoculars that will not focus properly througn the right eyepiece. Just wondering if this is a common problem and is it worhtwhile getting repaired


The binos will rack focus both at the same distance, you need to rack focus left side to distant image with left eye only, then turn diopter focus to focus right eyepiece. Diopter focus is thinner wheel behind focus wheel

Aug 15, 2015 | Pentax DCF HRc (10x42) Binocular

1 Answer

10year old pentax 8x24 PCF G very stiff focus


you cold try lubing it with the drip down method, squirt penetrating oil in the focus rack and hold so it flows into rack. They used a thick grease for damping, you may try heating it in an oven up to 130F for 5 minutes (or leave in a hot car) to soften grease and then actuating the focus to get the hardened grease back into the helix.

Dec 07, 2012 | Pentax Optics

1 Answer

Stiff focus wheel


The number one rule is to never use oil on a binocular!!
I suspect that the multistart thread on the focus arm carrier, which is internal, has become gunged up. This is not an easy repair for a beginner. The rubber has to be removed from the body of the binocular before you can even start to take them apart to determine the fault.
Like any bearing or gear system, the part would have to be cleaned with a degreaser, then reassembled with new lubricant.

Jan 04, 2010 | Pentax PCF WP II (8x40) Binocular

1 Answer

One side won't focas


You don't say what model binoculars you have, but there are two possibilities (well, three, but the third one is that your binocs are broken - lets try the other two first!)

Some very fine binoculars have individual focusing for each eyepiece. You focus each side for your eyesight. If that's the case with your binoculars, there won't be a central focusing control.

If you DO have a central focus knob, it's possible that your binoculars have a "diopter" focus on one or the other eyepiece. Look at the rim of the eyepiece for a marking that looks like "+ . . . | . . . -" or something similar. What you want to do is focus the binocs using the central control so the the UNMARKED eyepiece is in focus for you (close one eye to focus), then switch eyes and focus the marked eyepiece by rotating the eyepiece rim until both eyes have good focus.

Binocular manufacturers do this because many people have better vision in one eye than the other, and many people also prefer to use binoculars without their glasses. Hope this helps.

Oct 07, 2009 | Barska Optics Optics

1 Answer

I bought these for my husband. In trying them


Difficult to answer specifically without knowing the model. But binoculars are designed to view objects in the distance. They all have a limit as to how close they will focus based on the magnification and design. Objective lenses that are far apart such as on a porro prism binocular will not focus very close. The nature of the design of having the objectives further apart than the eyepieces doesn't allow it. When trying to focus too close the image will appear blurred and double. That is the nature of the design. 9 feet or 3 metres is considered quite close to focus a binocular and is usually for a model designed to do this such as a roof prism where the objective lens and the eye lenses are inline. A specialty binocular such as the Pentax Papilo will close focus to 50 centimeters. It has been designed so that the objective (large lenses) lenses converge.

Take into account when focusing that binoculars are also designed to compensate for differences in each eye. One of the eyepieces either right or left will adjust seperately. For binoculars with a center focus ring. First focus using the center ring with one eye covered. The eye that should be covered is the one that doesn't have the adjusting eyepiece. When the image is clear close the eye you have just used and leave the center focus alone. Focusing on the same spot look through the eyepiece that adjusts and turn the eyepiece ring until the image is clear. Now all you have to do is focus using the center ring only as the binoculars are adjusted for each eye.

Some binoculars do not have a center focus and each eye will adjust seperately.

Jul 29, 2009 | Optics

1 Answer

Double Vision Pentax 10x50 PCF III


If you have double vision it is out of collimation (alignment of the optical axis). You need to send this to the manufacturer for repair.

Jul 05, 2009 | Pentax PCFIII (10x50) Binocular

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