Algernon

Joined: 22nd May 2010

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Algernon
There's blue in the timber as well at the bottom, so there must be mixed lighting.

Comment by Algernon posted on Composition in the shed at 13/10/2010 - 09:55

Algernon
That's great news!.... I bet they don't get a donation of £850
every day.

Comment by Algernon posted on Thank you to Pentax Forum Buyers helping the Stroke Association at 12/10/2010 - 21:31

Algernon
Dangermouse wrote:
I think a standard Z1 is the only AF SLR I'd like to add to my collection, for a rather esoteric reason. It can be set to leave the film leader out, making it compatible with my daylight developing tank which loads film in the same way as a camera does.
Does the Z1-p do that as well Matt, I've got both, but can't
remember. I think the Z1-p had an extra item on the menu as
well as panorama mode. Really nice cameras to use with the
two wheels.... similar to digital.

Comment by Algernon posted on Pentax Z1 75 years edition and 28-70mm lens at 12/10/2010 - 21:27

Algernon
Great shot. I would never have thought it possible.... very
impressed with the 1600ISO

Comment by Algernon posted on Manchester Town Hall at 12/10/2010 - 20:34

Algernon
coker wrote:
Peter,

I think it's where the "daylight" has crept in under the roof & has shifted the colour temp.

The timber looks warmer at the top as well.

Any theories?

Roger.
Looks like the wrong colour balance, but it looks better
blue so I'd leave it.

Comment by Algernon posted on Composition in the shed at 12/10/2010 - 19:51

Algernon
That looks the business You should have no trouble selling that.

Comment by Algernon posted on Pentax Z1 75 years edition and 28-70mm lens at 12/10/2010 - 19:38

Algernon
I've seen QPcard-201 before looks quite good and only about
11 Euros and the software's free. I'll order one tomorrow to
mess around with.

Comment by Algernon posted on White Balance / Colour correction tools at 12/10/2010 - 19:36

Algernon
It would be interesting to know how the trigger mechanism worked?
Pre war it would have been all mechanical apart from a flashgun.
She would no doubt have had to make a return visit to pick up the
photos, until they switched to Polaroid.

Comment by Algernon posted on A life at the fairground at 12/10/2010 - 10:44

Algernon
Technoblurb wrote:
So does the Expodisc work when the camera is in shade and the subject is in bright light? I assume it does, but have to ask.
You use it like an incident light meter where you take the camera to the subject and point it back to where your going to use the camera from. Press the green button to get a manual exposure setting and then set the WB using manual capture as per the camera manual. It just means pressing the shutter to capture the WB and then OK on the camera back. Then go back to where your taking the photo from. You can change the exposure again if need be.

I tried it before pointing the camera at a table lamp that had a largish 20w energy saving bulb in it of unknown colour balance. The exposure and WB I captured were spot-on. It actually read on the computer screen 117R 117G 117B which is exactly right...... I was surprised it was so close.

I also tried a shot at the same lamp with the Expodisc on and the camera set to AWB.... I was surprised to find that it wasn't right.

It's a lot of money though for such a simple item.

The videos on the site are quite good.

Comment by Algernon posted on White Balance / Colour correction tools at 11/10/2010 - 18:38

Algernon
My Expodisc is 58mm and I have 2 step down rings. To use it I leave the rings on the lens and just push or pull the Expodisc off. It isn't threaded it has ball bearing type catches that fit into the filter thread.

The grey card is difficult to set up and take accurate readings from.
On the computer you get different readings from different parts of it.
The Expodisc is very accurately calibrated even comes with a test certificate.

Mine is correct to 00R 01G 01B the white density rating is 0.74
18% would be 0.745 An error of +/- 1/6th stop would be in the range
0.695 - 0.795 So my incident manual metering should be spot-on.
If I set the camera to +0.5 stops in Av mode I get a grey (RGB)
value of about 115 which is only about 4 out.

Comment by Algernon posted on White Balance / Colour correction tools at 11/10/2010 - 13:42

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