Is it the scratch that makes it "one of the best"

Scratches do effect lens performance.

Buyer beware

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Are Wine Gums to be included in the recommended limits which
incidentally weren't based on anything scientific someone just
said that's one unit of alcohol in this glass

Can you transfer units from your wife if she doesn't use up
all of her allowance and do units consumed abroad count

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All this talk about one of my favourite beers is making
me thirsty! Lancaster Blonde 4.1%

http://www.lancasterbrewery.co.uk/

It and other beers are on offer at ASDA at present 4 for £5
500ml Bottles.

Asda_Link

I tried Sainsburys to see if their Price Match worked
but it didn't So I'm off to ASDA

Good Luck with the sale.... Looks like someone
will get a bargain

10mm in front looks about right. Unfortunately red doesn't
photograph too good and you can see that there isn't much
DOF at f/1.2 I still think the lens is capable of
better, there may still be a bit of camera shake. Did you
have the mirror up and a 2/3 sec. delay?

Sadly that's the only way you can get the focus spot on,
with MF... I normally use a focusing rack and bracket
in 7mm steps and then pick out the best.

Good subject matter is needed for this lens.... some examples..

http://www.flickriver.com/search/porst+f1.2/

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Someone had a party and didn't invite US

I think your problem of sharpness is due to the focus
being slightly out. Try it on a tripod with a shot on
focus of a box or a bottle and then without changing the
focus move the bottle back 10mm, take a shot, move
another 10mm and take another. Then move it back to
the original position and repeat the shots moving the
object towards you.

The shot of the leaves above isn't too bad. You only
have about +/- 7mm DOF and there may be some camera
or leaf movement. The bokeh looks good.

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The DA 55-300mm is one of my favourite lenses, but I would
never have thought that it would cope with the low contrast
at 10,000ISO like that.... at f/6.3 as well. I am amazed

I always thought the 800 limit applied just to the width.
I cropped them at 900 high, because 800x800 cut too much
off and I wanted to go +3 and -3 either side.

They are no longer 100% crops and have gone a bit softer,
so I'm not sure if they are of any use.

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I've recently been doing some tests on the
Porst Color Reflex MC Auto 55mm f/1.2 in a K Mount
and notice that Jal87 has just put one up for sale
so I thought it might be useful to post some of the
results here.

This is an excellent lens almost identical in performance
terms to the Tomioka 55mm f/1.2 version. Like all f/1.2's
it has hardly any DOF at f/1.2, but does have a wonderful
bokeh at all apertures. It's very sharp at f/2 and beyond.
Shining a torch through the lens elements look identical to
the Tomioka version apart from the MC colours being different.

This test was of a focus test chart at 45deg to the camera.
I was really checking for focus shift and it only seems
very slight and is well compensated for by the increased
DOF. I checked up to f/5.6

The following are 100% crops from JPG's straight off the
camera. K-5 at 100ISO - LED Daylight Lamp - Tripod

F/1.4 hardly any DOF lowish contrast usable for the strong bokeh




F/2.0 very sharp




F/2.8 slightly sharper with bigger DOF




The f/4 and f/5.6 results are similar.

EDIT: Sorry the forum software has mucked these up by
reducing them from 800 wide to 711 wide

Makes the test a bit pointless so I'll have a
think in the next few minutes about deleting the
whole topic.


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