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Telephoto Lenses with focal lengths longer than 60mm.

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  #1  
Old 12th March 2016
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Sigma 30mm f1.4 DC DM Mft fit

Sigma have brought out a mini-telephoto lens for fit MFT mounts, a 30mm f1.4. Although no full reviews are out yet, initial impressions on the web seem to be positive. It is probably designed to compete with the PanLeica 25mm f1.4 but the offer price is significantly less than what the PanLeica started out. It is available at 239 from some of the mainline dealers and the bundle includes a nice looking lens hood.
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Old 12th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

Does look like a bargain at that price, doesn't it but is this FL getting overcrowded ? There's 4 ( I think ) 25mm already before Olympus bring out the f1.2 in the summer...

Price of the Sigma looks to be a winner though but will it give enough to persuade those with the existing ( and smaller ) 25mm to change ?
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Old 12th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

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=damianmkv;380418 Olympus bring out the f1.2 in the summer...
But isn't that slated to be a PRO job? Methinks you are looking at somewhere around 750 at least.

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Price of the Sigma looks to be a winner though but will it give enough to persuade those with the existing ( and smaller ) 25mm to change ?
IMO, not to owners of the PanLeica 25mm 1.4 (I am one); but don't be surprised if you start seeing lots of For Sale adverts for the Panasonic 25mm f1.7 and Olympus 25mm f1.8 soon!
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Old 12th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

You could well be right - I'm no good at working out DoF but I read that the 30 f1.4 will give similar blur to the 25 f1.2 ? Don't know if that's correct or not but if it is, then I'd rather then 500+ in my pocket..
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Old 12th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

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Originally Posted by damianmkv View Post
You could well be right - I'm no good at working out DoF but I read that the 30 f1.4 will give similar blur to the 25 f1.2 ? Don't know if that's correct or not but if it is, then I'd rather then 500+ in my pocket..
Right. Neither 25mm nor 30mm MFT are really true Portrait focal lengths but IMO if you do want human portraits with good bokeh using those lenses, you have to be between 2 and 3 metres from the subject. Based on that, here are the figures:

1. Olympus 25mm f1.2 PRO (July 2016)

- At 2 metres.......0.24m (1.89m - 2.13m)
- At 3 metres.......0.55m (2.75m - 3.3m)

2. Sigma 30mm f1.4 DC DM

- At 2 metres.......0.20m (1.91m - 2.1m)
- At 3 metres.......0.45m (2.79 - 3.24m)

Unless I am mistaken, bokeh depends upon the rear part of the DoF, which is still better (shallower) in the Sigma but the difference is less.

I think that you get to keep your 500
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Old 13th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

My 25 f1.8 is 82cm at 3m so on that basis ....
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Re: Sigma 30mm f1.4 DC DM Mft fit

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Originally Posted by damianmkv View Post
My 25 f1.8 is 82cm at 3m so on that basis ....
That's good but as you know, shallower the DoF, better will be your bokeh. The comparative figures for your lens are:

3. Olympus 25mm f1.8

- At 3metres........0.84m (2.64m- 3.48m)

That's almost twice as deep as the Sigma 30mm f1.4. More importantly, the DoF in the Olympus 25mm f1.8 extends 0.48 metres behind a subject 3 metres from the lens whereas in the Sigma 30mm f1.4 it extends only 0.24 metres......exactly half as much.
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Old 13th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

That is the one thing that I miss from my Nikon days I must admit
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Old 14th March 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

The early reports on this Sigma 30mm f1.4 DC DN are quite flattering for the build quality, technology used and optical performance. Taking all that into account, the 239 price tag is very reasonable....maybe even too reasonable...making people wonder "where's the catch?". Compare this to the PanLeica 25mm f1.4 (superb in every way) which started out at around 430 and even now is more than 100 more expensive than the new Sigma.

There must be a catch somewhere. Or is there?
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Old 14th March 2016
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Sigma 30mm f1.4 DC DM Mft fit

Barrel distortion is pretty severe from the samples I've seen...of course you can sort that in PP but shouldn't have to
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Old 23rd October 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

The MFT versions of this lens have received very good reviews and the chromatic aberration seen with the Sony-fit lenses does not appear to be a significant issue with the Oly-Pany ones. I am certainly very pleased with mine.
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Old 23rd October 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

I just looked at some images of this Sigma lens. It's huge. Slightly bigger than the 75/1.8. I guess it's not surprising since it's designed for APS-C.
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Old 23rd October 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

What is this doing in the telephoto group?

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  #14  
Old 23rd October 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

Quote:
Originally Posted by pdk42 View Post
I just looked at some images of this Sigma lens. It's huge. Slightly bigger than the 75/1.8. I guess it's not surprising since it's designed for APS-C.
I think one can get fixated on the size. Yes, it is large but lighter than the Olympus 75mm f1.8. Both feel quite good when fitted to the EM5II.

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What is this doing in the telephoto group?
I would have thought for MFT lenses anything over the 'standard' 25mm focal length is by definition a telephoto lens.
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Old 23rd October 2016
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Re: Sigma 30mm f1.4 DC DM Mft fit

Quote:
Originally Posted by pdk42 View Post
I just looked at some images of this Sigma lens. It's huge. Slightly bigger than the 75/1.8. I guess it's not surprising since it's designed for APS-C.
Given Sigma's ability to 'bend' optical rules maybe it's actually a 55mm f/3.5 with a built-in focal reducer.
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