Question about Contax Chrome Gf-21 21mm Viewfinder - G1 G2 Camera Zeiss Biogon 21/2.8 Lens

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Need an upgrade to green sticker

21mm lens

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What does 18x21 mean on binoculars

18 power magnification, and the second number is aperture 21mm or how big the main lens happens to be--

But your two numbers do not make any sense. No one sells an 18 power 21mm binocular.

Usually something like 10x50mm.

Jan 17, 2011 | Optics

6 Answers

Lens error and green light flashing


power related issue.

check your batteries - charge or new

fxnlogo_s.png Technical Support, Instructions & Repair Service

Jun 23, 2008 | Casio EXILIM ZOOM EX-Z60 Digital Camera

1 Answer

When the projector is turned on the image has a big, off red splodge covering 80% of the projection. I have stripped the projector back to the lens and discovered that one of the three screens (I don't...

did anyone every respond to you? were you able to find a replacement part? We have the same projector and exact same problem and trying to fix. Any assistance would be great.


Nov 02, 2010 | Hitachi CP-X445 LCD Projector

1 Answer

Is the Vivitar 21mm 3.8 a good lens for Nikon?

For what you can buy them for these days, they're excellent and were usually made by Kiron who made excellent lenses in their own name and also for Tokina and Vivitar.

But unless you're using a full frame Nikon (i.e. 35mm or the full frame digital professional bodies) then it's nothing special as it has the same angle of view as a 31.5mm lens (close enough to a 28mm for discussion purposes). A 28mm f3.8 offers no advantage over many of the kit zoom lenses which come with many Nikons and with the huge advances in optical design since the 21mm Vivitar was made are likely to be optically superior.

On balance, if your Nikon is a 35mm film SLR or a full frame sensor version then go for it as it's a fantastic super-wide angle lens. With anything else, it simply doesn't make much sense. What it will still do though is offer fantastic depth of field which will be lacking in relative terms on a 28mm lens designed for APS-C sensors.

Feb 23, 2010 | Vivitar Super Wide Angle 19mm f/3.8 Manual...

1 Answer

Lens error

This is a firmware problem that happens with many of the new cameras. It will have to be upgraded. The manufacturer will repair it for $50. Otherwise you may get lucky enough to find the upgrade software on the internet

Aug 04, 2009 | Pentax Optio 50 Digital Camera

1 Answer

Size of strut bolt - 21mm or 22mm

If your talking about the large bolt and nut the attaches the strut to the spindle then that bolt is 22mm

Apr 08, 2009 | 2001 Lexus ES 300

3 Answers


This lens is intended for a Nikon underwater camera which are branded as Nikonos cameras. These cameras are underwater 35mm cameras and this lens is and extreme wide angle lens to capture underwater scenic’s. This lens is rather expensive and of very high quality. I hope this helps!

Go Ahead. Use Us.

Jul 17, 2008 | Nikon 15mm f/2.8N UW-Nikkor IC Lens

1 Answer

Lens Error

It is just telling you to try to turn the camera off and back on. This usually doesn't self correct and will need to be serviced. I would call Canon for support and see what the options are for service or upgrade.

Hope this helps!

May 13, 2008 | Canon PowerShot A460 Digital Camera

1 Answer

How Do I upgrade my laptop from W98 to Wxp?


Most laptops with the original Microsoft OS has a sticker underneath with the 25 character code. That would be what you need for Win98 assuming that it is the original OS installed in the laptop.

For the new OS (Win XP), the new code would come either with the CD installer or on a sticker.

Hope this be of help/idea. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Feb 06, 2008 | Compaq Presario 1275 Notebook

1 Answer

Arched picture at bottom seperating the green and red

Your tv has a convergance failure. the convergance ic's need to be replaced. Upgraded part # STK392-150 or STK392-160. Both ic's should be replaced to prevent future failure of other colors.

May 20, 2007 | Toshiba 43H70 43" Rear Projection...

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