Alongside the X-M5 and the XF 16-55mm F2.8 R LM WR II, Fujifilm also announced the XF 500mm f5.6 R LM OIS WR, the latest and longest Telephoto Prime lens for X-mount cameras. Here is a real-life scaled-size comparison of the new lens with three Super Telephoto zoom lenses to give you a better idea about its size.
(click on the image for a larger version)
Fujifilm XF 150-600mm F5.6-8 R vs Fujifilm XF 500mm f5.6 vs Fujifilm XF 100-400mm F4.5-5.6 vs Tamron 150-500mm F5-6.7 VC VXD
As seen on the image, the XF 500mm f5.6 R LM OIS WR is significantly more compact and lighter than its arguably biggest competition, the Fujifilm XF 150-600mm F5.6-8 R LM OIS WR. We have no doubt that the XF 500mm will have a superior image quality compared to the XF 150-600 but it is also pricier and doesn't offer the convenience of a zoom, so this will be an interesting dilemma for x-mount shooters.
The XF 500mm f5.6 R LM OIS WR appears noticeably smaller and lighter than its main rival, the Fujifilm XF 150-600mm F5.6-8 R LM OIS WR. While we expect superior image quality from the XF 500mm (and Fujifilm claims it has the best image quality of any XF lens), it comes at a higher price($2,999 vs $1,999)and lacks the zoom versatility of the XF 150-600mm. This presents an intriguing choice for x-mount photographers (Compare XF 500mm vs 150-600mm).
Also check: Fujifilm XF 500mm f5.6 Size with X Mount Cameras
And we have a comparison table of these four lenses: