Algernon

Joined: 22nd May 2010

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Algernon
F Stops quoted for 35mm camera lenses are usually very accurate
so T-Stops aren't needed.

Zooms are usually slightly worse than primes, but still good.
This one is fairly typical....

http://www.adaptall-2.org/lenses/01A.html

f/2.8 actual 2.82
f/3.8 actual 3.96 Probably didn't want to call it an f/4 lens

A Pentax 50mm f/1.4 lets in slightly more light at the
lower f stops than the f/1.7 does.

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Comment by Algernon posted on T-stops vs F-stops at 15/08/2014 - 12:00

Algernon
All good , but the third one is my favourite.

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Comment by Algernon posted on Some more red squirrels at 12/08/2014 - 08:31

Algernon
Now with USB 3.0 being on all new PC's it's better to buy only
the fastest cards for downloading to the PC. Some are quite
fast but trail well behind Flash Drives.

Anyone with a PC without USB 3.0 can get a PCI-E card for about
£10 which will give them the faster downloads.

I timed a 16gb Sandisk Extreme Flash Drive (cost £11) the other
day copying 500GB of DNG files to RamDisk and it took under
4 seconds....... 150 MB/s (Sandisk claim 200) ..... Wow!!!

Any new cards I buy now need to be at least 70 - 95 MB/s
jobbies. I don't need it for shooting but don't want
to be WAITING ALL MINUTE while it downloads


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Comment by Algernon posted on k7 card at 10/08/2014 - 19:58

Algernon
I thought you were on about zoom binoculars

I've gone back to the Pentax one after spending over £100 on
far east magnifier replacements, due to the circular rubber
eyepieces screwing themselves off and getting lost

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Comment by Algernon posted on 1.08x -1.58x zoom viewfinder eyepiece magnifier at 06/08/2014 - 19:10

Algernon
You never get proper catchlights from a squirrels eye anyway so
it's best just to leave them as they are. Unfortunately a lot
of times the eye will be pure black which sadly usually
ruins the shot and it's not usually worth the bother of trying
to clone catchlights in.

The catchlights in Alans shots are actually very good for
squirrels. It's usually more like this.....

Comment Image


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Comment by Algernon posted on A few red squiggles at 05/08/2014 - 12:32

Algernon
Just won't work.... no matter how low you go
Example very weak flash and not full on to the eye...

Comment Image


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Comment by Algernon posted on A few red squiggles at 05/08/2014 - 11:34

Algernon
McGregNi wrote:
What are you doing with your shiny new 540FGZ? It should have been out with you on this shoot... Would have given ideal natural looking illumination and catchlights
You can't go anywhere near a cyril with a flashgun even a weak
one..... The whole eye just lights up red even on grey cyrils

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Comment by Algernon posted on A few red squiggles at 05/08/2014 - 08:11

Algernon
I'm quite sure Ozeck was a brand name used by Comet.
So all their stuff would be re-badged and available under other
names.... sometimes Clubman. I wouldn't expect the TC's to
be much good although they did a very good Super Ozeck 135mm
f/2.8 tele lens, also sold under the Ensinor brand.

The TC might be the same as the Ensinor one and that wasn't
much use either.

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Comment by Algernon posted on Cheap multiplier at 04/08/2014 - 20:22

Algernon
Fantastic especially the 4th.

No problem with the blade of grass on the 1st.

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Comment by Algernon posted on A few red squiggles at 04/08/2014 - 12:50

Algernon
From the title I thought you had a Showcase in the garden
for displaying WR lenses

All excellent would look good in a calendar containing
just July and August I love pictures of summer as I
like to imagine it

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Comment by Algernon posted on WR Kit Lens Garden Showcase ! at 04/08/2014 - 12:46

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