Irix 150mm f/2.8 Macro 1:1, as the very name suggests, has the focal length of 150mm and the 1:1 mapping scale, thanks to which it is to ensure very convenient work during macro photography. Due to the longer focal length, we will be able to avoid covering the light falling on photographed objects and scaring them away.
The optical system of the lens is based on twelve lenses placed in nine groups – there are three low-dispersion elements and four made of high-refraction glass. The producer assures that the distortion should be reduced to the level of 0,01%. The lens is equipped with the internal focusing system thanks to which the whole construction does not change its size during focusing. The lens’ aperture consists of eleven blades and it can be closed up to the value of f/32. The characteristic traits of the device should be nice background blurring and the diffraction which should happen later than in other lenses of such a type. Sharp photographs can be taken already from the distance of 34.5cm.
1). Irix 150mm f/2.8 Macro 1:1
The lens has the "Dragonfly" finishing, which means that it is a combination of advantages of "Firefly" and "Blackstone" lenses – the frame has been made of aluminum and the housing – of aluminum and magnesium alloys with composite elements. The whole construction has been sealed with particular focus put on the most sensitive places (front lens, focus lock ring, focus ring and bayonet). The lens is relatively light and small, its dimensions are 87 × 135mm and its weight - 840g. We will be able to mount filters with the diameter of 77mm on its front.
2). Irix 150mm f/2.8 Macro 1:1
The ring with the rotation scale of 270 degrees is to ensure high precision and culture of work. There is also a possibility of blocking the focus ring. The lens’ processor enables the control of the aperture from the level of the camera and the AE mode makes it possible to use semi-automatic modes (PASM). Thanks to this, the information on confirming focus from the level of the camera will be saved in the EXIF data.
3). Irix 150mm f/2.8 Macro 1:1
If we buy the Irix 150mm f/2.8 Macro 1:1 lens, we will receive it in a stiff case in which we will also find a deep sunshield and the tripod grip in the Arca Swiss standard. The lens will be available with the Canon EF, Nikon F and Pentax K mounts.
We don’t know yet when the lens is going to appear on sale. Its price is also unknown.