IRIX 150mm f/2.8 Dragonfly Macro

Anyone own or have experience with this lens?

IRIX 150mm f/2.8 Dragonfly Macro

I have not gotten a chance to use this but am fairly impressed with the other two Irix offerings, the 11mm and 15mm.

I would also be interested in knowing how this lens performs.

Review of it by Lenstips.
https://www.lenstip.com/index.php?test= ... =556&roz=1

Seems to me the focusing issue outside of the macro range is easily accomplished by putting the camera in live view and turning on Focus peaking as long as the camera has this feature.  Most new cameras have this capability.

I do question a lens review in 2019 being done on a 5D3 - a low resolution camera, by today's standards, with a heavy handed AA filter.  Resolution data is virtually useless from a camera such as this.

E.J. Peiker wrote:Seems to me the focusing issue outside of the macro range is easily accomplished by putting the camera in live view and turning on Focus peaking as long as the camera has this feature.  Most new cameras have this capability.

I do question a lens review in 2019 being done on a 5D3 - a low resolution camera, by today's standards, with a heavy handed AA filter.  Resolution data is virtually useless from a camera such as this.

They use many different cameras for their reviews, so I find it impossible to understand when comparing different lenses, so I just look at the general pattern. It certainly doesn't look like a winner wide open, but then again I would be shooting closed down anyway.
The Sigma 180 macro looks like the best long macro out there.

Both the Sigma 150 OS and 180 are outstanding macro lenses.

E.J. Peiker wrote:Both the Sigma 150 OS and 180 are outstanding macro lenses.

Macro lenses - The most valued characteristic beyond focus ring smoothness is the amount of rotation required when shooting multi-layer images (Helicon Focus the compositing software).
   Increased rotational distance (or degrees) provides the most uniform frame-to-frame spacing plus precision.
   Lens reviews, spec sheets, nor general commentary ever mention rotational focus movement.  Is there way to determine (distance or degrees) prior to buying a macro lens?
   Examples of two lenses I own:
   Canon 180mm f/3.5 Macro requires a scant 1/16" (or less) ring-movement when shooting at f6.3
   Zeiss Batis 135mm f/2.8 (a focus-by-wire electrical method) allows about 1/2" of focus-ring movement when shooting at f6.3, it's a shear delight to use.
   Though the latter is not a "macro" lens, substantial flower closeup work I've done is noticeably better with the Zeiss, plus it's far easier to handle (much lighter and less bulky):  color rendering is better, sharpness, and at a given f/stop actually transmits nearly a half-stop more light! Zeiss, unfortunately, doesn't make a true macro lens.

A lot of people use focusing rails for hard core macro photography which are very precise.