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Help me choose between these cheap lenses
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PostPosted: Sun Feb 03, 2019 7:28 pm    Post subject: Reply with quote
Sciolist wrote:
kiddo wrote:


I meant, the difference between the 28 and 35 mm is only 7mm ,but in a crop m4/3 there are 14mm difference in focal length. Depending what he's going to use the lens for, might suit him better the 28 or the 35 (close shots portraits the 28 would do better in m4/3 ,but in fuji the 35 would be the right choice).



I see exactly what you are getting at kiddo, but perhaps the terminology used isn't quite right. The focal length of the 28 or 35mm lenses does not change because you use a crop sensor. Crop sensors only give the appearance that the focal length has changed due to the field of view changing (you are looking though a smaller portion of the 28 or 35 lens). The only thing that can change the properties of a lens is more glass, for example a focal reducer or a multiplier.


I hope that makes sense. For example, if you put a 28mm lens on an MFT camera, you don't get a 56mm lens. You get all the properties of a 28mm lens, including its focal length, but with a narrower view through it that makes it look like a 56. It isn't a 56. It's still a 28, with all the properties that entails.

I can see why this gets confusing as I don't think I've explained it very well myself.


Indeed, in specific terms ,i'm having hard time to explain myself , not even trying to blame that english is my third language and ,basically only use it to read stuff on internet. Tuzki with lens


PostPosted: Sun Feb 03, 2019 8:01 pm    Post subject: Reply with quote
kiddo wrote:


Indeed, in specific terms ,i'm having hard time to explain myself , not even trying to blame that english is my third language and ,basically only use it to read stuff on internet. Tuzki with lens


Like 1 Friends .


PostPosted: Sun Feb 03, 2019 9:39 pm    Post subject: Reply with quote
tb_a wrote:
cgustav wrote:
I guess my question would be, how can I tell if it's 5/5 or 7/7? Serial Number?


The easiest and best way to identify the different Minolta versions can be found here: http://minolta.eazypix.de/lenses/


No. That site gives alot of info, but not what you need to tell the 28mm 7/ 7 from the 5/5.

The easiest way to tell the plain MD 7/7 from the 5/5 is the serial number.
7/7 serial number starts with 8.
5/5 serial number starts with 9.


PostPosted: Sun Feb 03, 2019 10:19 pm    Post subject: Reply with quote
walter g wrote:
tb_a wrote:
cgustav wrote:
I guess my question would be, how can I tell if it's 5/5 or 7/7? Serial Number?


The easiest and best way to identify the different Minolta versions can be found here: http://minolta.eazypix.de/lenses/


No. That site gives alot of info, but not what you need to tell the 28mm 7/ 7 from the 5/5.

The easiest way to tell the plain MD 7/7 from the 5/5 is the serial number.
7/7 serial number starts with 8.
5/5 serial number starts with 9.


Useful, thanks!

And thank you all for helping.

Since I have found two good deals on the Vivitar 35 and the Tokina 28, I bought them right away. The Vivitar, unfortunately, is not Komine made (which as Rosedalelad suggested should perform better) but most likely Tokina as this chart explains: https://www.cameraquest.com/VivLensManuf.htm
Well, for the price I can't complain. If it's not good I'm not wasting much money anyway.

I saved the rest of the budget for something a little juicier which, considered the suggestions, could be either the Minolta or the Pentacon.
I'm leaning towards the Pentacon, if only because it's a 29mm, and I don't have one yet.


PostPosted: Mon Feb 04, 2019 12:09 am    Post subject: Reply with quote
walter g wrote:
I guess my question would be, how can I tell if it's 5/5 or 7/7? Serial Number?


tb_a wrote:
The easiest and best way to identify the different Minolta versions can be found here: http://minolta.eazypix.de/lenses/


cgustav wrote:
No. That site gives alot of info, but not what you need to tell the 28mm 7/ 7 from the 5/5.

The easiest way to tell the plain MD 7/7 from the 5/5 is the serial number.
7/7 serial number starts with 8.
5/5 serial number starts with 9.


You're right. I didn't realize that the plain MD III 28mm/F2.8 lens changed the formula within the same version. Obviously that's the only lens which is that tricky. Even the weight didn't change.
However, the different order no. 590-810 vs. 590-910 gives the hint.


PostPosted: Mon Feb 04, 2019 4:13 am    Post subject: Reply with quote
D1N0 wrote:
You might also look at Pentax. The super-takumar 35mm F3.5 is very compact and sharp and contrasty. SMC Pentax-m 28mm F3.5 is a very sharp and contrasty lens.


I almost overlooked that!

Thanks for pointing that out, it does look compact indeed. Hm... another contender now to consider.
I'll look for samples.


PostPosted: Tue Feb 05, 2019 10:14 pm    Post subject: Reply with quote
Still looking at the alternatives and I went back to the Minolta.
I've seen a few options, can't really figure which should I go with from the pictures (and only two of them have SN and they both start with 10)

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PostPosted: Tue Feb 05, 2019 11:26 pm    Post subject: Reply with quote
cgustav wrote:
Still looking at the alternatives and I went back to the Minolta.
I've seen a few options, can't really figure which should I go with from the pictures (and only two of them have SN and they both start with 10)


Take the very left one to be on the safe side. It's the latest MD III version in 5/5 construction with 49mm filter thread. The other ones seem to have the 55mm filter thread which might be the old construction. Maybe the very right one is also OK (possibly a MD II version) but hard to say without seeing the front markings.


PostPosted: Tue Feb 05, 2019 11:51 pm    Post subject: Reply with quote
tb_a wrote:
cgustav wrote:
Still looking at the alternatives and I went back to the Minolta.
I've seen a few options, can't really figure which should I go with from the pictures (and only two of them have SN and they both start with 10)


Take the very left one to be on the safe side. It's the latest MD III version in 5/5 construction with 49mm filter thread. The other ones seem to have the 55mm filter thread which might be the old construction. Maybe the very right one is also OK (possibly a MD II version) but hard to say without seeing the front markings.


Perfect!

Thank you, Thomas!
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