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Telephoto Lenses with focal lengths longer than 60mm.

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Old 5th June 2015
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Cunning 45mm f1.8 to 75mm f1.8 conversion

"What?" I hear you say... If you can get hold of the exceedingly cheap C-180 1.7X Olympus teleconverter, and a 37->52mm (in either one or several steps), you get this (apologies for iphone image):



The results are rather impressive:

Full:



Centre, 100%:



Click through to full image area:




Obviously you don't get the EXIF and the IS will be relying on 45mm settings for stabilisation (so it works, but not quite as well). What you do get is a 75mm f1.8 (screw-on TCs do not affect the f stop of the combined lens), very little vignetting and very good image quality for 30 more than the cost of the 45mm f1.8.

Andy
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mZuiko 12-40 f2.8 Pro, 45 f1.8, 60 f2.8, 40-150 f2.8 Pro, 300 f4 Pro
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Old 5th June 2015
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

Impressive indeed!

I do have a C-180 teleconverter and guess what I am going to do now!
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

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Originally Posted by zuiko-holic View Post
Impressive indeed!

I do have a C-180 teleconverter and guess what I am going to do now!

Great, please post any results! I sold my 75/1.8 to get the 40-150/2.8. The 45/C-180 combo really is surprisingly good. Other screw in TCs are generally awful, but this one (despite plaggy build quality) is a peach.
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Olympus E-30, E-M1 mk1&2 ZD 7-14 f4, PL 25 f1.4D
mZuiko 12-40 f2.8 Pro, 45 f1.8, 60 f2.8, 40-150 f2.8 Pro, 300 f4 Pro
MC-14, HLD-7, HLD-9
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Old 6th June 2015
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

I've takens some pictures with this awesome combination -> https://www.flickr.com/photos/dsmouz...57654148182875

I am truly amazed by the results, it works really well!
It is hard to notice any sharpness loss!

Notes:
All pictures taken @ f/1.8
The pictures have been downsized to 8MP.
There have been no corrections in terms of CAs, distortion and sharpness.
I have noticed a difference in exposure time (about 2x) but then again the framing is diferrent (76mm vs 45mm).
The closest focus distance with the C-180 converter has increased substantially.
However, if you reverse the C-180 converter the closest focus distance is decreased and the m.Zuiko 45mm can be an effective close-up lens!
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Old 7th June 2015
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

That's very impressive. Of course, this may mean it is about to get much more expensive to get hold of one!
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Old 7th June 2015
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

The timing difference I think is down to a few things, the light loss through the TC and the fact the front element is smaller than what would ideally be needed for a 76mm f1.8. Despite this, there is little vignetting and in DOF terms, 76mm f1.8 it is. The bokeh is a bit jittery compared with the proper 75 f1.8 mZ, but really not bad. The build of the C-180 is a bit nasty, but price performance is great. I got mine in a Salvation Army shop in the US for $10... There are larger (same multiplier but bigger front element) TCs about, but they tend to give much softer results.
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mZuiko 12-40 f2.8 Pro, 45 f1.8, 60 f2.8, 40-150 f2.8 Pro, 300 f4 Pro
MC-14, HLD-7, HLD-9
Metz 58 AF-2 , Manfrotto 441, Gimbal Head, Velbon Neopod 74

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Old 7th June 2015
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

There is a C-210 Teleconverter that is a 1.9x that may also be worth trying too.
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mZuiko 12-40 f2.8 Pro, 45 f1.8, 60 f2.8, 40-150 f2.8 Pro, 300 f4 Pro
MC-14, HLD-7, HLD-9
Metz 58 AF-2 , Manfrotto 441, Gimbal Head, Velbon Neopod 74

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Old 13th June 2015
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Re: Cunning 45mm f1.8 to 75mm f1.8 conversion

The C-180 also screws directly onto the 12-50 and looks promising for the 'macro' mode; I'll try to get some shots up tomorrow evening.
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