View Full Version : 45mm f1.8 vs 50mm f2

9th September 2013, 12:53 PM
Since I got my EPL5 in July, I have not used my E3. In fact I haven't used it since we went to the States in May. My HG and SHG glass has all been used with the EPL5 giving excellent results. The focus and the handling is the main bug bear, which we all know about. The soon to be announced EM1 should sort this out though. Which brings me on to my 50mm f2.

I love the IQ of this lens and it seems just about the right size on my EPL5 without looking silly or affecting the handling. Of course focusing is verrrrrry slow but MF is fine. Anyway, I am starting to think that maybe I should consider selling it and getting the nearest equivalent in mico 43 land, the 45mm f1.8. I know that I would lose the macro capability, which I don't do a lot of but do you consider this a wise move?

9th September 2013, 01:01 PM
I had the excellent 50mm f2 and used it on the E620 etc. It is, as you know, a very good lens indeed. The AF on mirrorless cameras is glacially slow.

Anyway, I sold it and bought the 45mm f1.8 lens. Now that is amazingly good for the money and the AF is lightning fast by comparison. Is it as good as the 50mm f2?

Hmm. No, I don't think so. It is very very good, but the 50mm is nearly perfect. Where the 45 fails is in longitudinal CA, purple/green fringes on bright stuff in front and behind the point of focus. The effect is quite small but it's there. You can banish it by stopping down.

Does the 45mm do macro? No.

Can it be made to do macros? Well I have a set of the Kenko m4/3 macro tubes that allow AF.
http://e-group.uk.net/gallery/data/622/EM530929.jpg (http://e-group.uk.net/gallery/showphoto.php/photo/47908)
Yes you do get a macro lens that way but you can tell the 45mm doesn't like it. You need to stop down to f8 or so to get the results you would like across the entire frame. You might need to do this anyway to get half decent DoF....

Which would I prefer on my camera? The 45mm. Every time. Despite it's shortcomings. Just for the excellent quality and the fast AF...


edit. I just searched my gallery... I knew I had addressed this before:

45mm at f1.8 and 16mm tube

http://e-group.uk.net/gallery/data/622/45m16f18.JPG (http://e-group.uk.net/gallery/showphoto.php/photo/47903)


45mm at f5.6 and 16mm tube

http://e-group.uk.net/gallery/data/622/45m16f56.JPG (http://e-group.uk.net/gallery/showphoto.php/photo/47904)



9th September 2013, 03:44 PM
I don't have any experience with the ZD 50mm or Pete's macro work but the 45mm gets my vote. I use it for all sorts of applications and it never fails to amaze me considering it's price. See my post below http://e-group.uk.net/forum/showthread.php?t=28873.


9th September 2013, 09:24 PM
I have had and used both mainly for portraits formal and candid and in my opinion for that type of work the 45mm f/1.8 walks all over the 50mm f/2.

9th September 2013, 09:40 PM
I would go for the 45mm on a m4/3 system, if I was staying with 4/3 I would stay with the 50mm.

While I note you don't do much macro the Oly 60mm 2.8 macro is also a good portrait lens and it does have a focus limiter giving a snappy AF as a medium range lens.