r._m_ller

<p>I use this tiny lens on my M4-p, and with adapter on my Fuji X-E1 without any problems - and it is a fine lens if yours is in good condition. Moderate contrast, neutral colors and only in backlight situations it is a bit prone to flare.<br>

As you have said - "it indrudes <strong>quite a bit</strong> into the body" ... not like old angulons or biogons. M7 and M9 user will confirm this information.</p>

<p>Canon 25mm f 3,5 (Dezember 1956) in screwmount<br /> "A super wide angle lens with a diagonal angle of view 82°, developed based on Topogon (manufactured by Carl Zeiss, Germany. Angle of view: 100°. f/6.3). This lens has a unique optical system: a spherical lens element with a very high refraction index is used as the first lens element and a special optical glass lens element with the infinite radius of curvature is used as the rearmost lens element. This lens was the fastest lens in the world as a 25mm lens at the time." (Canon Camera Museum)<br /> I use the lens for about two years with very good results - and the classic look of the fifties. Optimal with the viewfinder from Voigtländer.</p>