Question about Pentax *ist D Digital Camera

1 Answer

Strange problem with istD and external flash AF240ft

I have a Pentax AF240FT flash that works properly with only some lenses. When used with my FA28, F35-70, and F50 the flash underexposes (it seems the flash fires at the same intensity all the time). When I use my DA16-45 or FA80-320 it works properly(haven't tried it with M lenses yet). Another thing is when the AF240 sees a focal lenth shorter than 35mm it flashes a yellow indicator to remind you to use the wide angle adapter, this light flashes with the DA16-45@<35mm but not when the FA28 is mounted.

Posted by Anonymous on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has achieved Level 3.

  • Master
  • 542 Answers

I have the same flash and I have only used it with my FAJ 18-35 and FA 24-90. Exposure seems to be darker with the FAJ 18-35 than with the FA 24-90 which is fairly good. When compared to the RTF, the exposure is also darker for both lenses but I would say the RTF overexposes than is correct. Regarding the coverage warning lamp, my 240 did lit up correctly with the 1.5X multiplying factor already taken into account by the camera, i.e., the 24-90 don't have the warning and with the 18-35, the warning lamp lit up when I zoomed near the 18mm. So, everything seems normal for my setup. Anyway, I shall try your mentioned lenses F 35-70 and DA 16-45 later on and see if these lenses exhibit the problems you described and will keep you informed.

Posted on Sep 08, 2005


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Pentax istd built in flash goes off when taking picture but picture is underexposed but if I use a different flash in manual mode the camera works ok

What distance are the subjects when using the built-in flash?

The built-in flash is optimized for use between 0.7m (2.3ft) and 4m (13ft).

You could also try adjusting the ISO setting (higher ISO requires less light) or adjusting the EV value to a positive number to increase the exposure.

May 14, 2010 | Pentax *ist DL Digital Camera

4 Answers

Pentax MZ-60

have you tried cleaning the lens contacts with soft cloth?

ifnot do that.

is there no problem with out the lens in there?

Sep 18, 2008 | Pentax MZ-60 QD 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

Can I re-mount thot shoe that went off my Pentax *istD by myself?

Its it a good camera. So dont try to re-mount the hot shoe by your self. Please contact Pentax service center.

Feb 01, 2010 | Cameras

1 Answer

Can Film Camera lenses and Flash be used for Digital Camera Body

If u used to have a Pentax camera, i would recommend you buying a Pentax DSLR, because Pentax film lenses still works on Pentax DSLR. I still use some of my prime lenses on my K10D.

Jun 05, 2009 | Pentax MZ-60 QD 35mm SLR Camera

1 Answer

Pentax MZ-60

please do a firmware upgrade

tell us what happened

Sep 18, 2008 | Pentax MZ-60 QD 35mm SLR Camera

2 Answers

Problem with AF-360FGZ Flash

Yes. The *istD shutter can only provide X-sync for electronic flash up to 1/150 sec. The *istDS reaches 1/180 sec. "High speed" electronic flash is done by strobing the flash repeatedly during the period that the shutter slit is traveling across the focal plane, at th expense of cutting power output quite a bit.

Sep 08, 2005 | Pentax AF-360 FGZ TTL Flash

2 Answers

Exposure problem

I've found that the *istD underexposes ( as it should metering 18% grey ) light subjects, or with light backgrounds. A white wall using TTL ( AF500ftz ) behind any subject it always turns grey! You need to manually adjust 1 stop over. With dark subjects, overexposing with out blowing out much. If your used to the metering from a PS digi cam the *istD takes a bit of getting used to.

Sep 08, 2005 | Pentax *ist D Digital Camera

Not finding what you are looking for?
Pentax *ist D Digital Camera Logo

71 people viewed this question

Ask a Question

Usually answered in minutes!

Top Pentax Cameras Experts


Level 3 Expert

102366 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Greg Cann
Greg Cann

Level 3 Expert

1114 Answers

Are you a Pentax Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides