George Lazarette

Joined: 14th January 2004

All Forum Comments

Topics Created Topics Contributed Forum Comments Photo Comments

All Forum Comments

George Lazarette
Quote:
Well, these were with my K10D, under mixed (fluorescent and halogen) lighting, ..........
Dan
I didn't say it was impossible (in the hands of an expert!), just tricky.

The problems occur when different parts of the image take their primary lighting from different sources. You then can't get the colour balance correct for everything.

G

Comment by George Lazarette posted on K10D Inside Building. at 02/11/2007 - 11:04

George Lazarette
Are you being a little bit slow today? You still haven't said what was wrong with the images. Was it focus, exposure, colour balance?

If the last, experiment a bit, and best of all, use a grey card.

Although I have to say that, in a building with multiple light sources (especially a mixture of halogen and tungsten), correct colour balance is always going to be tricky.

NEVER throw away pictures with which you are dissatisfied until you have identified the cause of the problem.

And 99% of the time, it is safe to blame the user, not the equipment.

I would hazard a guess that the camera was set to daylight colour balance, but we'll never know.

G

Comment by George Lazarette posted on K10D Inside Building. at 02/11/2007 - 10:38

George Lazarette
Quote:
Kim C wrote:
I knew what he meant. 1/60 must be less than 1/125 because 60 is a smaller number.
I knew what he meant too. But it had to be done...

One day I hope to use a word he doesn't know, too.
Fair cop!

G

Comment by George Lazarette posted on AF 360FGZ Flash speed sync question at 03/11/2007 - 00:17

George Lazarette
Quote:
If the shutter speed is 1/4000 than the exposure simply can't last 1/180s or am I wrong? But anyway it seems to be correct that the flash should 'flash' at least 20x so that the whole frame is properly exposed. Any other ideas, links?
You are mixing things up.

You can either take a conventional flash exposure, with any old flashgun, and the flash will fire while the shutter is fully open.

The length of time a shutter is fully open varies from camera to camera, but with a focal plane shutter is usually no more than 1/250, and generally rather less. This is the "flash sync speed".

With HSS, the flash sync speed doesn't apply. The gun fires a number of flashes as the slit formed by the shutter moves across the sensor/film. Provided they can sync it right, and the flashgun is powerful enough, there is not really any limit to the HSS speed. On the K10D sync'ing can be at the camera's maximum shutter speed.

G

Comment by George Lazarette posted on AF 360FGZ Flash speed sync question at 02/11/2007 - 12:58

George Lazarette
High speed flash sync requires that both the body and the flashgun are able to support it. The K10D can, the MZ-5n can't. With the K10D and AF360-FGZ you can indeed sync at higher speeds.

High speed sync works by taking multiple flashes at different points in the shutter cycle. Normal flash requires the shutter to be fully open when the flash fires (once), and the shutter is only fully open at speeds of 1/125 and below.

G

Comment by George Lazarette posted on AF 360FGZ Flash speed sync question at 02/11/2007 - 10:50

George Lazarette
This picture should (IMO) have been taken higher, to include more of the interesting clouds, and to lose most of the somewhat boring water.

G

Comment by George Lazarette posted on Classic harbour scene, but does it work? at 02/11/2007 - 10:57

George Lazarette
Well, I would say that if you own a Limited lens, the only way to get another lens of the same quality is to buy another Limited.

Simple really.

G

Comment by George Lazarette posted on Very interesting article. at 01/11/2007 - 10:27

George Lazarette
Quote:
50/1.4 on film

35/2.0 on digital
That's what you might call the "standard reply"!

G

Comment by George Lazarette posted on Your Choice ? at 04/11/2007 - 11:08

George Lazarette
Another way to put this is, which lens would you least like to be stolen?

For me, the 77mm Ltd.

G

Comment by George Lazarette posted on Your Choice ? at 01/11/2007 - 10:30

George Lazarette
"The marks of men, ancient and modern".

Or - "Haven't we come a long way in three thousand years".

(Please excuse the colour - it was taken through a tour bus tinted window.)

Comment Image


*Ist D, 24-90, ISO 200, f8, 1/640, 90mm, -0.3 EV, aperture priority.

G

Comment by George Lazarette posted on Weekly Competition #17: The Mark of Man at 03/11/2007 - 23:27

Proudly supporting Pentax User

Samsung Logo Asahi Pentax Logo