Hyperfocus 500mm Lens

[PhotoHobbyist]

Some more testing revealed that this particular lens is a case of bad sample variation. The focus ring is out of line with the distance marks. An object 25 ft away is not sharp until the ring is rotated to the 30 ft mark. the difference is even larger at longer distances.
I returned the lens for a replacement.

Perhaps you need a "spacer ring set" such as 12mm, 25mm, 40mm spacers. You can stack them to get alternate sizes between the camera and lens.

 

[JensPlusLens]

Perhaps you need a "spacer ring set" such as 12mm, 25mm, 40mm spacers. You can stack them to get alternate sizes between the camera and lens.

As I mentioned, the lens has a sample variation problem with the focusing mechanism.
I have returned it and received the replacement yesterday afternoon. I will test the replacement sometime today, time permitting.

 

[Thiophilos]

Perhaps you need a "spacer ring set" such as 12mm, 25mm, 40mm spacers. You can stack them to get alternate sizes between the camera and lens.

What??

The difference in lens extension between focusing at 25 ft and 30 ft is only about 6 mm.

 

[RAZKY]

Would you be so kind and explain the difference between the two?

I'll let the experts explain it:

Hyperfocus: The ADHD Phenomenon of Hyper Fixation

Hyperfocal Distance Explained

In this article, I will explain hyperfocal distance and give several methods to get the sharpest possible photographs with maximum depth of field.

photographylife.com

 

[Golem]

What are you talking about? No DOF? That would equal no image. You make no sense at all.

Shot with my 500mm.

mountain by Trevor Baldwin, on Flickr

No DoF ... thaz what I wrote cuz its real.

Your theoretical correctness is of no PRACTICAL value, as evidenced by your really nice landscape example photo.

 

[zombiesniper]

What are you talking about. No DOF equals no image.
Please provide som evidence to back up your outlandish statements.
Bye the way the practical DOF in this image is about 2KM.

 

[Golem]

What are you talking about. No DOF equals no image.
Please provide som evidence to back up your outlandish statements.
Bye the way the practical DOF in this image is about 2KM.

At infinity focus its a zillion miles (~1.7 zillion KM).
But so what ? In real world use, no DoF.