Resolution checking?

Lounge
1

One of the perks being an old age pensioner is
that I can devote my time to whatever I presently
fancy.

The other day I wanted to check which of my semi-antique
lenses was “the best”.

But what would be a good way to decide on a lens’ sharpness,
contrast, and resoution?

I found this SIemens Stern Camera Calibration Patterns – Nerian Vision Technologies,
on the Web, downloaded it, and printed it on a 1200 dpi HP LaserJet.
When trying to focus on the star (from twice the focal length of the lens),
it gave some indications about the lens quality.

Then I got another idea, and tried to catch as many details as possible from
some minute strands of a cut piece of reinforced cardboard box tape:

snitt
snitt1035×786 269 KB

Anyone having better ideas on how to go on in the search for the “ultimate”
lens?

Have fun!
Claes in Lund, Sweden

2

I’m no good at New Years resolutions - so I don’t do them… usually :laughing:
But back to the point,I only just got the double meaning of the post title! I never was much good at getting that kind of thing either, come to think of it.
I don’t know about lens testing. My ‘method’ is to just use a new lens for a while, and if I like the results, :+1: and if I don’t, :-1:. Very scientific!

3

Hi all,

I just changed the title of this thread, because
it could be misinterpreted :frowning:

The last few days’ experiments have resulted in a few new,
interesting discoveries. Here is the first one:

mir1b
mir1b814×376 493 KB

And here is the most recent:

400pct
400pct716×2468 2.11 MB

Enlarge this image to 400%, and look at the printed blue area.
Now, that is a good resolution, in my mind. (And you cannot imagine
what tiny little lens I used to catch it!)

Have fun!
Claes in Lund, Sweden

1 Like
4

Very colorful! I won’t even try to guess what lens you used though…