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RvL
Joined: 16 May 2021
Posts: 13
Location: The Netherlands
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 Posted: Sun Sep 12, 2021 8:11 pm Post subject: Any information on the Unitax 70-230 f/4 MC Macro Auto Zoom |
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RvL wrote:
Hi all,
Today I bought a Unitax 70-230mm f/4 Macro MC in Olympus OM mount for a mere €10. I don't have any information on it, except the specs written on the lens itself. It looks like a typical Japanese rebrand and looks a lot like the Vivitar 70-210 Series 1 v.2 as shown here, second from the left
 [/img]
Which makes me wonder if this Unitax is a Tokina made lens? The only similar lens I found online is the Deitz 70-230mm f/4 but that doesn't ring a bell to me either.
Some pictures of the lens itself:
The lens is f/4 over the entire focal length an has 6 aperture blades. Pull to zoom. Macro gear goes to 1:3. Weight without caps is approx. 810gr., height is 17cm.
I haven't had the chance to actually use it because the OM-EFM adapter has yet to arrive. But for this price I just wanted to give the lens a try.
I'm very interested in any information you can come up with! |
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RvL
Joined: 16 May 2021
Posts: 13
Location: The Netherlands
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| Posted: Mon Sep 13, 2021 9:18 am Post subject: |
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RvL wrote:
After scouring the internet a bit more, especially sites such as eBay, I found that it probably is a lens made by Sun: https://www.ebay.com/itm/332396376415
Besides that, I can't find much on the lens. The focal length, 70-230mm is also a bit odd. As soon as the adapter arrives, I will post some photos. |
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D1N0
Joined: 07 Aug 2012
Posts: 2495
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| Posted: Mon Sep 13, 2021 9:42 am Post subject: |
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D1N0 wrote:
Looks like Tokina to me
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pentaxian |
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RvL
Joined: 16 May 2021
Posts: 13
Location: The Netherlands
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| Posted: Mon Sep 13, 2021 10:07 am Post subject: |
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RvL wrote:
| D1N0 wrote: |
| Looks like Tokina to me |
That's what I thought at first as well, but I didn't find any infomartion about Tokina making a 70-230 f/4 |
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D1N0
Joined: 07 Aug 2012
Posts: 2495
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| Posted: Mon Sep 13, 2021 10:47 am Post subject: |
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D1N0 wrote:
All I can find that looks like it is a Deitz MC 70-230mm f4.0 https://www.ebay.com/itm/113179558006 Here is one that says Sun http://lens-club.ru/lenses/item/c_5172.html But the chrome ring at the Bottom is very Tokina.
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pentaxian |
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PBFACTS
Joined: 24 Dec 2008
Posts: 565
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| Posted: Mon Sep 13, 2021 11:22 am Post subject: |
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PBFACTS wrote:
yes the mount is the tokina/komine version of om mount BUT the macro ring design is 100% sun !
_________________
OM USER .. I KEEP/USE:
Om2 sp + T32 (grip/filter/zoom) + T8
+ Zuiko 16mm 3.5 / 55mm 1.2 / 65-200 4/ x1.4
+ Sigma 8mm 4.0 / 14mm 3.5 / 18-35 3.5-4.5
+ Tamron 35/105 2.8
+Tokina 150/500 5.6
+ Kiron 105/2.8 macro 1:1
+ Vivitar S1 90/180 falst field macro
+ 2x Doubler HR7
>>I SELL: OM10 + OM4ti
+ i sell: OM Md1 + Md 2 + Grip PowerPack + charger
+ i sell: OM Zuiko 24mm 2.8 / 28mm 3.5 / 50mm 1.8 / 50mm 1.4 / 50mm 3.5 macro / 35-70 3.6 / 35-105 3.5-4.5 / 75-150 4 / 500mm / 2xA
+ i sell: OM Kiron 28/105 3.2-4.5 / 1.5 converter
+ i sell: OM Makinon reflex 5.6/300 + Spector reflex (makinon) 500mm
+ i sell: OM Macro panagor extender 1:1
+ i sell: OM Sigma 16mm 2.8 fisheye (last version) / 21-35 3.5-4.2 ot/ 28-70 2.8 /1000mm mirror
+ i sell: Tamron 28-70 3.5-4.5 / 28-80 sp 3.5-4.2 / 28-135 sp 4-4.5 / /28-200 3.5 / 35-135 3..5-4.5 / 90mm sp macro 1:1 2.8
+ i sell: OM Soligor 2x doubler / x3 converte
+ i sell: Soligor FisheEye x0.15
+ i sell: OM Tokina 28/135 4-4.6 / 70/210 3.5 (= vivitar S1 v2)
+ i sell: OM Vivitar 28-70 3.5-4.8 / 28-90 s1 2.8-3.5 / 35-70 2.8-3.8 / 55/2.8 Macro 1:1 (komine) / 70-150 3.8 ot (kiron) / 75-150 ot 3.8 (tokina + 2x matched)
+ i sell : OM cosina 100-500 5.6/8 |
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RvL
Joined: 16 May 2021
Posts: 13
Location: The Netherlands
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| Posted: Thu Sep 16, 2021 4:34 pm Post subject: A couple of days with the Unitax |
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RvL wrote:
So I had the Unitax for a couple of days now and took 500+ photos with it to test it. Mostly doubles to rule out motion blur or the same subject on different apertures.
 Mounted on the puny Canon M50
 The collection
My findings so far:
- it's big and it's heavy.
- MFD of 2.5m, which was quite normal for a zoom back then
- Small focus throw of approx. 110 degrees, making it challenging to precision focus
- Soft at f/4 but sharpens quite a lot stopped down. Usable from f/6.3 onwards
- Macro gear reduces the MFD of the lens to 42cm @70mm. Stopping down in macro is a must, because it is very, very, very soft and hazy at f/4 and 5.6. Sharp at f/8 onwards
- Corners stay behind in sharpness
- Doesn't hesitate to show a bit CA
but somehow I quite like the lens. It adds some range to my collection, with the MOG Orestor 135mm being the biggest upto now.
Some real life shots
 Dionaea muscipula
 Smile!
 Portrait of a duck
 Street art
 Landscape @230mm |
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