Error Message on LCD Screen


Kenty

Link Posted 07/10/2011 - 17:36
My K5 has occasionally stopped working and the LCD screen shows "F - - -"

This happened sometimes with my K7.

After some switching on/off - zooming - changing ISO it disappears and the camera works OK. Frustrating if you want to use the camera quickly.

Does anyone know what the error message means and is there anything I can do about it. Whether the battery is fully charged or not does not seem to matter.

Cheers....John
On a dark desert highway, cool Pentax K5 in my hand.
My Kit
K5 & 18-55 Kit lens, K7, Pentax 18-250mm lens, Sigma 10-20mm lens, Sigma 105mm Macro lens, Pentax 50mm 1.7 lens, Cokin P Series Filters

Mike-P

Link Posted 07/10/2011 - 17:45
Is it with one particular lens or has it happened with more?

Guessing it happens with a Sigma.
No equipment list here but thanks for taking an interest. My Flickr

matwhittington

Link Posted 07/10/2011 - 18:29
I think I am thinking along the same lines as Mike. I get that same thing occasionally with one lens (a sigma) and I fix it by depressing the button on the lens mount and just rotationally wiggling the lens in the mount a little. I assumed it was due to a loss of contact between the lens and the camera as that is the display you typically get when you attach a manual lens.

Could be way off though...

Mat
Mat W

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Kenty

Link Posted 07/10/2011 - 18:31
The only Sigma lens I have I use rarely. It happens with my Pentax 18-250 lens.
Any ideas??
cheers. John
On a dark desert highway, cool Pentax K5 in my hand.
My Kit
K5 & 18-55 Kit lens, K7, Pentax 18-250mm lens, Sigma 10-20mm lens, Sigma 105mm Macro lens, Pentax 50mm 1.7 lens, Cokin P Series Filters

greynolds999

Link Posted 07/10/2011 - 18:47
Have you tried cleaning the contacts? Is there any chance that water/dew has got in anywhere?
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Mike-P

Link Posted 07/10/2011 - 18:51
matwhittington wrote:

Could be way off though...
Mat

You were spot on actually

Kenty wrote:
The only Sigma lens I have I use rarely.

You have 2 Sigma lenses in your sig .. 10-20mm and 105mm macro

Anyway, the fact it only happens with one lens and 2 bodies suggests probably a contact fault on the 18-250mm.
No equipment list here but thanks for taking an interest. My Flickr

Kenty

Link Posted 07/10/2011 - 18:59
Thanks. I'll clean the contacts. Soft cloth Ok or a cleaning liquid??

Cheers. John
On a dark desert highway, cool Pentax K5 in my hand.
My Kit
K5 & 18-55 Kit lens, K7, Pentax 18-250mm lens, Sigma 10-20mm lens, Sigma 105mm Macro lens, Pentax 50mm 1.7 lens, Cokin P Series Filters

Mike-P

Link Posted 07/10/2011 - 19:02
I wouldn't use liquid. Have seen others recommend a pencil eraser but as I have never had to clean the contacts I really can't say if that is good advice or not.
No equipment list here but thanks for taking an interest. My Flickr

fatspider

Link Posted 07/10/2011 - 23:45
I clean my lens mounts and contacts about every six months, I just wipe round with a disposable lens cleaning tissue, you would be amazed at the amount of muck that comes off.
My Names Alan, and I'm a lensaholic.
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Kenty

Link Posted 08/10/2011 - 01:37
Thanks all. I decided to clean the contacts with a soft cloth and as Alan says there was quite a bit of muck that came off onto the cloth.

Hopefully that will cure the problem.

By the way does anyone know what the error message actually means?? Just a bit curious!!

Cheers...John
On a dark desert highway, cool Pentax K5 in my hand.
My Kit
K5 & 18-55 Kit lens, K7, Pentax 18-250mm lens, Sigma 10-20mm lens, Sigma 105mm Macro lens, Pentax 50mm 1.7 lens, Cokin P Series Filters

matwhittington

Link Posted 08/10/2011 - 07:35
I assumed the 'F---' flashing means, that the camera doesn't know what aperture is set. Normally the display would highlight the selected aperture by displaying the f-number. With no communication between the camera and the lens (as the lens is either old/manual or the contacts are not functioning) then the camera doesn't know and so flashes F--- and if to say f???... I think. To overcome it you can obviously rectify the faulty contacts and get the auto modes of the camera back on track, or switch into manual modes.

Regards
Mat W

My Flickr: link

sterretje

Link Posted 08/10/2011 - 07:36
If memory serves me well:

F-- happens when aperture information can not be read from the lens. This can happen e.g. when it is not in the 'A' position or due to bad contact between lens and body. It can also be normal with older lenses (e.g. M42 lenses).

It will be flashing if 'use of aperture ring' (or something along those lines) is not set to 'allowed' in one of the camera menus.
Pentax K10D + Vivitar 55/2.8 macro + Super Takumar 55/1.8 + SuperMultiCoated Takumar 85/1.8 + SuperMultiCoated Takumar 135/3.5 + SuperMultiCoated Takumar 200/4 + Super Takumar 300/4
Pentax K100D + DA18-55ALII + DA55-300
Pentax K5 + FA31Ltd + M50/1.7 + DFA100WR + M120/2.8 (+ DA18-55WR at occasion)

Kenty

Link Posted 08/10/2011 - 16:29
Many thanks for the explanations. Never dreamed that F--- referred to the F stop. Now you've explained it to me it's obvious!!
As I mentioned earlier I've now cleaned the lens and removed some muck. I've had the lens for at least 2 years and the problem occurred when using this lens with the K7 and K5.
Thanks all again. John
On a dark desert highway, cool Pentax K5 in my hand.
My Kit
K5 & 18-55 Kit lens, K7, Pentax 18-250mm lens, Sigma 10-20mm lens, Sigma 105mm Macro lens, Pentax 50mm 1.7 lens, Cokin P Series Filters
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