Algernon

Joined: 22nd May 2010

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Algernon
Mannesty wrote:
Smeggypants wrote:
Algernon wrote:


LV Manual Focus seems better. I took 3 shots and they were
all spot on..... usually they are a little bit out.

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How would LV focus be off? It's through the sensor itself? i.e WYSIWYG
I think this could only occur if something moves between using LV for focusing and actually taking the shot, otherwise yes, WYSIWYG.
I'm talking about really critical manual focusing here with a
90mm Macro 1M from the target. The DOF based on the shots is about
+/- 6mm you can't adjust the focus ring that precisely so I've
used a Novoflex focusing rail marked in +/- mm's.

I centred the rail at 0mm when I checked the shot was sharp
using an Eye_Fi Card. I then kept my finger half way on the
shutter button and wound the rack away from the target from
about 20mm out.... it beeped and showed the green hex at -7mm
which is the top shot (below). The bottom shot is the LV MF shot.

I repeated the test from +20mm and it beeped at +7mm but this
shot was very slightly OOF, but at least I know that if I
focus using the green beep with this lens at about 1m I just
need to move about 7mm for exact focus. This is all at +8 ADJ

The bottom shot (at f/2.5 ) seems to have exceeded the
resolution of the sensor what looks like fine 45deg black
on white lines is actually the dots off the print screen
used to print a Brita filter box. The dots on the black tape
are specks of dust that I deliberately put there to focus on
with LV. You can see that there are more dust spots on the
bottom shot than the top one indicating better focus.

Once this was set up I could just change the camera ADJ
and see how it effected the two Beep/Green Hex positions.
ADJ of +6 for instance gave -9 and +4 which would be
perfect for catch in focus moving in towards the subject.

100% CROP
Comment Image


K-5 80ISO Daylight LED lighting

Don't forget that what you see on the LV screen
will have it's own DOF. I've not checked to see
if the Beep/Green Hex goes at +/- 7mm at
apertures beyond f/2.5. I would need a pre-set
M42 Macro to do that.

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Comment by Algernon posted on New Pentax Firmware updates for 6 cameras at 06/02/2013 - 17:49

Algernon
8,000 doesn't sound much when you compare it with
100,000 for a DVD-RAM Disk

Comment by Algernon posted on Graphics Card at 06/02/2013 - 13:53

Algernon
Use wide-open if possible. With an AF lens the focus will
be wide open anyway. By using the same you record the
same.

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Comment by Algernon posted on FF & RF Best Aperture? at 06/02/2013 - 13:43

Algernon
Algernon wrote:
I checked mine (K-5) yesterday with the new fware (from 1.13 to
1.14) and with the only lens I tried (Tokina 90mm Macro - Apply to ALL)
I had to change from +3 to +8 which was quite a bit. So something
has changed The lens is MF only.

I have -100 set permanently via the debug menu.

I've not tried any other lenses.

Edit: I'll have to check if the value via Debug is still
-100

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Debug mode setting hasn't been changed by the update.
Still at -100 which is the same as -10 on the ADJ MENU
So my +8 will be the same as -2

If other lenses are similar I can get rid of the
-100 Debug. I only needed that because one MF lens
needed higher than -10 ADJ.

LV Manual Focus seems better. I took 3 shots and they were
all spot on..... usually they are a little bit out.

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Comment by Algernon posted on New Pentax Firmware updates for 6 cameras at 06/02/2013 - 11:36

Algernon
I checked mine (K-5) yesterday with the new fware (from 1.13 to
1.14) and with the only lens I tried (Tokina 90mm Macro - Apply to ALL)
I had to change from +3 to +8 which was quite a bit. So something
has changed The lens is MF only.

I have -100 set permanently via the debug menu.

I've not tried any other lenses.

Edit: I'll have to check if the value via Debug is still
-100

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Comment by Algernon posted on New Pentax Firmware updates for 6 cameras at 06/02/2013 - 10:23

Algernon
Does this have the attachment for 1:1?

Comment by Algernon posted on F S Pentax FA 100MM f3.5 Macro at 06/02/2013 - 10:05

Algernon
Gwyn wrote:
johnriley wrote:
Always format a card in the camera it's to be used in before you start to use it. This will avoid problems.
I did that but instead of my first photo being #3 (actual actuation - Chris tested the camera before sending it to me) or #1 it is #26425 .
He must have used a card with #26424 on it and the camera MEMORY
is set to remember the last No. used.

Just set the camera not to remember the last No. Rename a JPG
to 0002 and it should pick up from there. Then set the camera
to remember the numbers again.

Comment by Algernon posted on Oh Bugger... at 05/02/2013 - 14:25

Algernon
If they pay for the new burial out of UK Taxes
all us Lancastrians should get a tax rebate

We've already given him the burial he deserved once

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Comment by Algernon posted on Another pointless thread at 04/02/2013 - 16:52

Algernon
parigby wrote:
I thought l saw on that "other" Pentax forum in the USA, that Pentax have officially said that a FF is on it's way, it being announced early 2014, available mid 2014.

philip
Don't know about thought ..... I think you mean you
dreamed

Latest nonsense on PF.... all 10 pages of it

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Comment by Algernon posted on Full Frame getting closer ? at 04/02/2013 - 09:54

Algernon
If your wall paper is showing a picture sharper than your image viewer,
it means your image viewer is JUNK!

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Comment by Algernon posted on PPI at 04/02/2013 - 09:44

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