Old post office and customs house

[ColRay]

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I'm not sure the images form my latest camera are as sharp as they could be.

So I have made a few changes

The original set up was 90mm focal length with a 400 micron pinhole.

I have now increased the focal length so it's now 112mm still with the 400 micron pinhole.

 

[cepwin]

Looks nice...you did a good job!

 

[Jeff Kubach]

Looks good to me.

Jeff

 

[DWThomas]

Lookin' good!

 

[PhotoBob]

Very well made image.

 

[Jim Jones]

It looks good to me, too. For a 400 micron pinhole and using PinholeDesigner with a user constant of 1.4, I'd try a focal length of 150mm.

 

[ColRay]

Thanks Guys
Jim I have had a look at the Pinhole Designer and the figures just don't add up. I'm not sure I understand the 'user constant' of 1.4 on the PD downloaded it shows 1.5 and the focal length is 129mm for the 400 micron pinhole

 

[Jim Jones]

You can set the user constant to whatever you want. I chose 1.4 based on testing for maximum sharpness in the center of the image. A larger constant favors sharpness towards the edges of the image at a cost of some sharpness in the center. There is more magic than math in pinhole photography. We can do whatever gives each of us the results we like.

 

[SMBooth]

That's a interesting little titbit Jim. Thanks, I learn more every day.

 

[ColRay]

Thanks Jim