Hi, my name is Steve and I'm a Sonnarholic. I've tried other lenses, I really have, Planars, Tessars, modern 'I don't even know what to begin to call them' formulae, but there's one optical formula that I keep coming back too. Currently I have a very nice Jupiter-8 on my Kiev, A rougher J8 LTM on my Zorki, and the 7artisans 35mm on my Fuji X cameras. But I can't help myself, I need more. So I'm looking at 'true LTM' options to fit my newly acquired Canon 7. When I was looking for another camera, something a little more modern feeling than my Kiev, I settled on LTM as the most versatile, forward compatible, budget friendly option. It's also probably the mount with the most Sonnar options available, several of them towards the affordable end on the scale. LTM I can adapt to Leica M, should I ever come to terms with the idea of owning a camera worth more than my car, it can also be easily adapted to mirrorless digital, essentially, it's probably the most versatile of the three main rangefinder mounts. M mount bodies are out of my budget, Nikon are nearly so and are not really compatible with anything else, Contax/Kiev, like Nikon, is a bit of a dead end (though see question below). So, I'm looking for a 50mm LTM Sonnar and willing to spend, say, 300€. The options I've identified are: 1. Canon 50mm f1.5 - as far as I'm aware, the only Canon Sonnar. 2. Nikkor 50mm f2 - much more affordable than it's faster brethren. 3. Remounted or otherwise modified Jupiter-8 or Jupiter-3. The first is so cheap I'll probably get it anyway, the second prices up against the Nikkor and Canon options these days. So, what are people's thoughts on the above lenses? There's not all that much on the internet, the Canon is virtually ignored in favour of the later Planar designs, the Nikkor eclipsed by the faster lenses. I know lenses are a very personal choice, far more so than camera bodies, what suits one person may be unpalatable to another, so in terms of image quality I'm looking for personal opinions rather than outright recommendations. In the realm of hard fact, are there any things to look out for with these particular lenses, a propensity for fogging, balsam separation, soft front elements? I must admit, the idea of using a Nikon lens on a Canon camera does have a perverse appeal (yes, I know that historically, it is actually very appropriate). I'm familiar with the differences between Soviet LTM and everyone elses LTM, also Contax/Kiev vs Nikon and, for that matter, I know the difference between LTM/L39 and M39 and own a bunch of M39 lenses. Finally, does anyone have any experience of the FOTOFOX Contax-LTM adaptor? Does it work? RF coupled? Worth it? FOTOFOX RF-L39 Contax Télémètre Objectif CRF RF pour Leica mount SM M39 L39 Adaptateur | eBay Thanks for reading.