Optimized for close-up shooting, the Pentax K-mount 150mm f/2.8 Macro 1:1 from Irix is a medium telephoto prime featuring a life-size 1:1 maximum magnification and a 1.1' minimum focusing distance for photographing nearby subjects. A bright f/2.8 maximum aperture enables working in a variety of lighting conditions and also offers greater control over depth of field for isolating subject matter. The 12 element, nine group optical design features a Neutrino coating, which helps to suppress lens flare and ghosting in order to achieve higher contrast and color accuracy when working in strong lighting conditions.

Complementing the optical assets is a robust physical construction, dubbed Dragonfly, which incorporates extensive weather sealing to guard against dust and moisture. This manual focus lens also features printed focus distance and depth of field scales to benefit fast and accurate focusing, and a rounded 11-blade diaphragm contributes to a smooth bokeh quality. Additionally, the included tripod collar has an Arca-type compatible foot for seamless compatibility with a variety of tripod heads.

K-Mount Lens/Full-Frame Format    Aperture Range: f/2.8 to f/32    Neutrino Coating    1:1 Magnification, 1.1' Minimum Focus    Manual Focus Design with Focus Lock    Depth of Field and Focus Distance Scales    Dragonfly Weather-Sealed Construction    Rounded 11-Blade Diaphragm

Medium telephoto prime is designed for Pentax K-mount cameras, however is also suitable for APS-C models where it will provide a 225mm equivalent focal length.

Bright f/2.8 maximum aperture suits working in a variety of lighting conditions and also affords greater control over depth of field.

Ideal for macro shooting, this lens offers a life-size 1:1 maximum magnification along with a minimum focusing distance of 1.1' to suit working with close-up subjects.

A Neutrino coating has been applied to limit lens flare and ghosting for improved contrast and color fidelity.

Manual focus design is benefitted by a positive focus lock mechanism to secure your focus position at any point to limit unwanted shifting of focus.

Depth of field scale benefits using hyperfocal and pre-focus techniques.

Included tripod collar features an Arca-type compatible foot for greater tripod head compatibility.

Dragonfly finish incorporates weather sealing to guard against dust and moisture.

Rounded 11-blade diaphragm contributes to a pleasing bokeh quality.

Includes complimentary additional rear lens cap.

Related Questions and Answers

Q: 1. Would this lens be used for astrophotography?

A: You could use this lens for astrophotography, but it would not commonly be used for that, as there is no use for a macro lens in that area. However, it would function well if you wanted to use a telephoto, rather than a wide-angle, lens.

Q: 2. Does this lens breathe when you focus?

A: According to IRIX, they state that the Irix 150mm has breathing effect on similar level as other macro lenses.

Q: 3. Is the IRIX 150 mm F/2.8 Macro compatible with Nikon D800?

A: Yes, compatible but manual focus only.

Q: 4. Will the Tripod Collar fit the Sirui Ball Head K-30X?

A: Yes, it is compatible with the K30X ball head.

Q: 5. Is this lens compatible with the Nikon D3200 camera?

A: Yes, it is compatible with the D3200. This lens is manual focus only, better for macro shooting.

Q: 6. Will this lens work with a plain Pentax K-3?

A: The IRIX 150mm f/2.8 Macro 1:1 Lens for Pentax K is compatible with the Pentax K3.

Q: 7. Will this lens work with (TTL) metering with SB700?

A: Yes, it will be ttl with the sb700.

Q: 8. Can the Tamron 2x teleconverter (model TC-X20C-700) be used with this lens?

A: Unfortunately, the Tamron TC-X2-C-700 is not compatible with the Irix 150mm f/2.8 Macro 1:1 Lens for Canon EF.

Q: 9. Just received my lens. Is anyone experiencing noise when changing the aperture?

A: There should not be a loud noise when changing the aperture. Sometimes they can make very quiet noises if changing a lot, say from f2.8-f10, but should be ok.

Q: 10. Will a Nikon F to Sony E mount adapter that controls the aperture in Nikon G type lenses (like the Novoflex Adapter) control the aperture in the Irix?

A: Yes you can use any of the adapters that support the Nikon G lenses such as this Metabones: https://bhpho.to/2gqoELB