Question about Pentax K1000 35mm SLR Camera

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Fresnal lense I tried to clean the fresnal lense and now it appears darkened and smudged. Any suggestions on what to do?

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First and foremost, anyone who has not cleaned one of these before, don't. It's a specialist job.

The screen must be removed to clean it. This is best done in an ultrasonic bath, exactly what cleaning agents to use depends on what the smudge is, but do not use solvents. The screen may be made from pastic, and solvents will ruin it. When clean the screen must be rinsed with distilled water and air dried.

To remove it the camera must be opened-up and the prism removed. To see how this may be done look at this Pentax camera repair website.



Posted on Jan 23, 2009

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What kind of camera? Some camera's have removable fresnel lens held on by a spring loaded frame. Other camera's must be disassembled to replace the lens. There is no way to repair a damaged fresnel lens.
Pentax K1000 must be disassembled.

Posted on Dec 07, 2008

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poolseman
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SOURCE: Fresnal lense

Hi-- first blow off any loose dust/dirt with blower and then you can use any rapidly evaporating cleaning solution ( window cleaning solution with amonia is OK ) to clean both sides. Do not use acetone ! ( will attack plastic ) . Benzine is also unsutable . Do not touch with fingers : remove with tweeezers and insert back with tweezers.

Posted on Sep 25, 2008

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I have the aperture at the lowest number but when I look into the viewfinder everything is dark and when I turn the aperture to lighten up the viewfinder it gives the fee


It sounds like the mechanical lever in your camera that normally couples the aperture to the camera to lock it to the widest opening for focusing is locked into the fully closed position, or that the electronics are not allowing the lens to open to fully open, depending on the type of lense being used.

Also, it could be an issue with the lense.

The simple way to test this will be to remove the lense, and to rotate the aperture ring while looking through the lense. If you see the aperture getting larger/smaller the lense aperture is fine. If it is not - the lense is damaged and needs to be replaced, or at best serviced. This can be done through Nikon, a local shop if you have one, or through online shops, I'd recommend KEH Camera in Atlanta if you have to go that way.

To test the camera side, if the lense appears to be working is also simple for the mechanical lever. With the lense removed, hold the camera in front of you looking into the lense mount. On the left side, you should see a small lever like piece. With your finger, see if this piece will move downward - it is spring loaded and should smoothly go down and pop back up. If it doesn't go down, or doesn't spring right back up, then the issue is on the camera mechanical side.

If both of those check fine, you may try a manual focus Nikon mount lense if you have access to one - to eliminate the camera electronics from being an issue, and the lense from being an issue as if this lense doesn't work, it's a mechanical issue. If you have access to another AF lense you know is working, and it doesn't work on your camera, you've narrowed it down to either the mechanical lever, or the electronics.

Most likely culprit is the lense itself.

Aug 26, 2011 | Nikon N65 35mm SLR Camera

1 Answer

HOW TO REMOVE FUNGES IN LENCESS.


Fungus is difficult, if not impossible, to remove from lenses. It'd require total disassembly of the lense by an experienced tech, cleaning, cleaning of the barrel, possible re-grinding of the element cleaned, re-cementing of the elements, re-aligning of the elements, etc. It's a time consuming, demanding, and technially requiring job, as well as a very expensive job. Unless it's a VERY rare and expensive lense, it's pointless to undertake. Fungus does not, or 99% of the time doesn't, form on the outer lens surface (though it appears that's where it is), it's actually inside the lense.

Aug 23, 2011 | Olympus OM-2000 35mm SLR Camera

1 Answer

While taking picture with my Canon Rebel xs when you look through the lens it's blurry why is that?


I'm gonna state the obvious and suggest the lenses may be dirty. If cleaning the lenses with a cloth doesn't fix the problem, send it for repair because it may be an internal problem you may be unable to repair yourself without the proper tools and know-how.

Jun 29, 2010 | Canon EOS Rebel XS 35mm SLR Camera

1 Answer

Does not flash with takumar zoom lens attached (Pentax SF10)


You don't state which Takumar model you have, but your camera is behaving entirely correctly.

The built in flash on the SF10 is automatically disabled when certain lenses are used, this is because the low position and narrow coverage of the flash combined with the size of many lenses causes the light path of the flash to be blocked or the flash coverage will simply be too narrow for some wide angle lenses; this can create vignetting or other dark shadows from the lens to appear in the photo. When a proper SMC-Pentax F lens is used the camera will warn you of this, but third party lenses like the Takumar lack the ability to trigger the warnings.

Built in flash units on all SLR's are just a handy get-you-by feature for parties and snapshots using standard lenses. For all other use, there simply is no substitute for using a proper external flash.

I suggest that you read the manual, if you don't have it then you can download it for free from here.

I trust that my answer has fully resolved your question; if so then please return the favour by rating my answer.

Mar 04, 2010 | Pentax SF1n 35mm SLR Camera

1 Answer

When I look through it, all I see is a fuzzy picture, like there is dirt or moisture on the lense. Is this a problem with the lense? I didn't drop it or spill anything on it. When I removed the lense cap...


Hello. From what you describe, there are several issues that *might* be occurring. First, the battery used in your camera did just what it was supposed to do--die quickly. Cameras need *steady*, proper power to perform correctly all the time. If the battery died slowly, it would drive the metering system (and any other power-dependent item) crazy due to improper current/voltage output. Yes, it's THAT important--the reason why you use silver-oxide or other such pricey batteries!! And change dem suckers EVERY year, too!!lol
Next, remove the lens and carefully inspect it using a bright table lamp. You are looking for signs of moisture (foggy or droplets). Also, and every bit as damaging is FUNGUS! Do you keep your equipment in that nice, cool, dark, closet or camera bag all the time? Prime fungus breeding environment. It grows on the INSIDE of the lens, on the glass surfaces and, if not removed in a timely manner, can etch the surface of the glass, ruining it. It can cause a cloudy appearance. But, so can our old. fiendish friend, OIL! The lubricants used to make that precision helicoid barrel(your lens focusing tube) slide so nicely is a nasty enemy when left sitting for long periods--or heated--like being left in a car on a hot day. It vaporizes over time, clouding up optics and far worse, gumming up the delicate, metal, diaphragm blades in the center of the the lens.(they give you your apertures--f-stops) Move the lever at the back of the lens to check the blade movement--it should be a quick, smart action with no laziness as the blades move--you need to set the lens to its max f-stop to see the blades move fully.
If the lens is not the problem, it could easily be the same fungus problem on the penta-prism(an actual precision, five-sided prism which directs your vision from the back of the camera down onto the reflex mirror inside the front.) in the top of the camera or even on the delicate focusing screens. Obviously, make sure there aren't smudged finger-prints on any surfaces--I've repaired cameras that looked like the owner held the thing by the lens glass and eyepiece. And don't forget to check the rear lens element for dirt. NOTICE OF CAUTION HERE: If the MIRROR is the foggy culprit, don't attempt to clean it--its sitting position, angle, and surface are CRITICAL. If you bend, scratch, mar, push, pull, tweak, etc that little glass wonder--its OVER! If the problem is discovered to be any type of internal, send the unit in to a competent repair facility. I know I've been lengthy---Hope I helped you!---Rick

Dec 28, 2009 | Nikon N75 35mm SLR Camera

1 Answer

Canon 400d err99 message when trying to take a picture. how do I resolve problem?


Error 99 also refers to communication problems between lens and camera, so worth cleaning the contacts...you can't lose anything in doing so.
1. Take your battery out and reinsert it - this will clear it.
2. Clean your lens contacts carefully with a plastic pencil eraser. Sometimes corroded contacts can cause errors like this.
3. Try the camera with different lenses - if it is occuring with several lenses, it may point more strongly to a camera fault.
4. Make sure you have the latest firmware installed.

Oct 08, 2009 | Canon EOS Elan 7ne 35mm SLR Camera

1 Answer

I would like to know what these do


Bower is brand name skylight is slightly yellow helps soften light there are diffrent densitys. Filter is mostly used to protect orginal glass of lens from dirt smudges scratches & rough treatment. Keep on lens most of the time.

Hyda brand name. PL 3 i believe to be a dark polarizing filter.

Quantaray 1A4 I believe is a haze or skylight filter.
Haze filter does almost the same as a skylight filter.

Hanimex brand name. Polarizing filter used to shoot through reflective glass or surfaces (water), also in color used to sharpen colors. The reason it is turnable is it is light directional beaning light comes through it at a angal hold up to light & turn it you can see how it darkens or litens. Also can stay on lens when not useing skylight filter.

reason you have 2 is one of each for two diffrent lens, 49mm & 55mm.

Hope this helped. Please rate.Thank You.

Mar 11, 2009 | Pentax K1000 35mm SLR Camera

2 Answers

Pentax ME super dirty mirror


Don't even think about cleaning the mirror in your SLR. For smudges and marks that can't be blown away with a handheld blower, you really need to have it cleaned by a repair shop. Most technicians clean mirrors with a special viscous fluid specially formulated to protect the fragile surface of the mirrors. Definitely do not attempt it with a standard lens cleaning solution or cloth as you could cause irreparable damage.

Keep in mind that this will not require disassembly of the camera, so the charge should be nominal

Nov 24, 2008 | Pentax ME Super 35mm SLR Camera

1 Answer

Fresnal lense


Hi-- first blow off any loose dust/dirt with blower and then you can use any rapidly evaporating cleaning solution ( window cleaning solution with amonia is OK ) to clean both sides. Do not use acetone ! ( will attack plastic ) . Benzine is also unsutable . Do not touch with fingers : remove with tweeezers and insert back with tweezers.

Sep 21, 2008 | Pentax K1000 35mm SLR Camera

1 Answer

Rebel xti


It sounds like you have something blocking your camera lense. Try taking the lense off and clean/brush it lightly. Do the same for the internal of the camera. You want to be especially carefull in this area. Now if it did this as soon as you first used the camera and it is completely clean, the digital film might be damaged. If that was the case, you need to get a refund or exchange for a new one. Let me know what happens!

Feb 27, 2008 | Canon EOS Rebel Ti / 300V 35mm SLR Camera

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