1.4x teleconverter SonyA580

Started Aug 23, 2014 | Discussions
Pip72 New Member • Posts: 6
1.4x teleconverter SonyA580

Dear All:

I have just realized that my Soligor DG Pro Teleconverter 1.4x for Minolta AF does not properly work when used with Minolta/Sigma for Minolta lens (any type) coupled to Sony A580. While it works well with any Minolta analogic camera, I saw that the focal length of the lens is not properly multiplied by 1.4 when the body is that of Sony A580. The focal length remains unchanged (so, for istance, with Minolta APO G 400/4.5 I still have 4.5 while using the 1.4 teleconverter).

I was thinking to opt for Minolta APO series II 1.4 x but, as far as I know, the latter would not be Ok with lens other than Minolta APO G Series, hence, it would be not Ok with Sigma 400/5.6 mounted on Sony A580 (I use Sigma especially during long trips becuase of its lower weight).

So, what should I do? Do you know if any Sigma 1.4x may work well with Sony digital cameras coupled to either Minolta APO G or Sigma 400/5.6 lens?

I really look forward to your kind reply, I really do not know what do to

thanks,

Filippo

Italy

Sony SLT-A58
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busch
busch Forum Pro • Posts: 32,381
Re: 1.4x teleconverter SonyA580

Does it take good pictures? That is the bottom line as the reported data does not really make any difference in most cases.

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Leon van Roosmalen Contributing Member • Posts: 575
Re: 1.4x teleconverter SonyA580

There is an advantage by not knowing the converter is present. The camera still does AF wich it woudn´t do with the original sony. In good light I can still AF the 70-400G.

The only disadvantage is that you dont see in the exif that you used the converter. I dont know if that has any influence for the SSS when it´s not reporting the right focal lenght but with a long lens and teleconverter mostly the shutterspeed is chosen short already.

Greetings Leon.

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Calico Jack Senior Member • Posts: 2,306
I have one for sale, but there are differences between makes/models

Ahoy!

Sigma TC's are designed to work only with Sigma lenses that have (IF) internal focusing. The distance between the TC and rear lens element is minute, so IQ is better retained, though the 1.4x EX DG APO is the one to get.  Other TC types with a dished recess are designed for lenses with a movable rear element to accept the element and rear lens.

You can find the Sigma teleconverter chart here and there's a fairly comprehensive TC chart on the Dyxum website.

FWIW, I have a Sigma 1.4x EX DG APO that has been endorsed by Sigma to be compatible with HSM lenses and SLT bodies (it's listed for sale in the DPR classifieds along with a lot of other items).  This is something you will need to check before you buy as with the introduction of SLT cameras there were incompatibility issues and

Sigma used to update the TC and sticker the box accordingly, though I'm guessing new TC's are already compatible.  Always ask the seller if the box has been endorsed or if there are any known issues especially if they use SLT.  For DSLR they're fine.

I'm sure you will see for yourself what makes/models/types work with what lenses and in what mode (manual/auto).

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OP Pip72 New Member • Posts: 6
Re: I have one for sale, but there are differences between makes/models

Ok thanks,

I was thinking of Sigma 1.4x EX APO yet niot the DG one, but, now, I will try both on my SonyA580 using either Sigma 400 and Minolta 400 and wil lsee what happen

Filippo

Calico Jack Senior Member • Posts: 2,306
Re: I have one for sale, but there are differences between makes/models

Pip72 wrote:

Ok thanks,

I was thinking of Sigma 1.4x EX APO yet niot the DG one, but, now, I will try both on my SonyA580 using either Sigma 400 and Minolta 400 and wil lsee what happen

Filippo

Ahoy!

It's unlikely the Sigma TC will work with another lens brand as it's designed specifically for Sigma lenses.  The TC compatibility chart can be found here.  Make note which lenses will retain AF or not (basically anything over F/4.5 will be reduced to manual focus) and it's essentially designed to work with internal focus (IF) lenses.  Kenko TC's (1.4x and 1.5x) are also very good, but the Dyxum TC thread is also excellent for reference material and info .

The later DG version has improved coatings to eliminate any ghosting or flare, though never use a lens with a filter fitted unless it's a specialist type like ND-GRAD or CPL as they will cause light streaking due to reflections and will make the images less sharp and will play havoc with contrast, colour and sharpness to name but a few.  Unlike the older lens models, modern optics have superior lens coatings therefore don't require any filters, though they OK to fit when in storage or transit.

The Minolta AF 400/4.5 APO HS G is a lens I'd really like to own, though to add a TC will require a tripod as to hand-hold with the lens + TC config will be very hard to hold with any degree of steadiness.  There's a boxed complete Minolta 1.4x TC listed on the Ffordes website (the seller is a UK Dyxum member so if you contact him, he may be able to offer it at a lower price as Ffordes charge a 20% commission) though I don't know where you live as your profile doesn't show it, though a Sony branded TC such as the SAL14TC will be far more expensive but there are no compatibility issues either, though if you get an 8 pin TC (not a Sigma version as they're brand specific) to use on your other non Sigma lenses which also have 8 pins, you'll keep the additional functionality such as ADI if using an external flash for example.  There's additional reference material on the Kurtmunger website for Minolta and Sony TC's and a general TC advice page on evilBay of all places, but how accurate or informative it is, I have no idea.  Another good TC resource is the MHohner website and you'll note there are 4x Minolta 1.4x TC's, so check all the tech info to ensure you get the right one assuming you opt for a Minolta branded version and not a Kenko version.

Hope that might shed some light on the subject and remember, if you have a G (GOLD) rated lens, you don't want to ruin it's IQ by using a cheap and cheerful TC.

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Mark (aka Pirate!)

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OP Pip72 New Member • Posts: 6
Re: I have one for sale, but there are differences between makes/models

First of all, many thanks. Well, I'm from Italy. Told that, the price of 1.4x sold by the Scottish selelr is nice. Nevertheless, your reply is very kind yet hugely technical to me, so that, at the very end, I feel confused. So, to be crystal clear, I would like to find a 1.4x that works well with both APO 400/4.5 G lens  as well as Sigma 400/5.6 lens when using Sony Alfa580. I understood, if I am right, that very likely Sigma 1.4x will be not that I am looking for, yet I will try. Minolta 1.4x, the one sold in Scotland and you adviced me, as far as I know, would be not ok on Sigma. Isn't it?

Thanks,

Filippo

sybersitizen Veteran Member • Posts: 8,383
Re: 1.4x teleconverter SonyA580

Pip72 wrote:

Dear All:

I have just realized that my Soligor DG Pro Teleconverter 1.4x for Minolta AF does not properly work when used with Minolta/Sigma for Minolta lens (any type) coupled to Sony A580... the focal length of the lens is not properly multiplied by 1.4 when the body is that of Sony A580. The focal length remains unchanged (so, for istance, with Minolta APO G 400/4.5 I still have 4.5 while using the 1.4 teleconverter).

Your teleconverter looks like this, correct...?

If so, that Soligor teleconverter must be mechanically and optically the same as the Kenko TelePlus Pro 300 DG. These are high quality generic teleconverters that work with many lenses... but unfortunately, as you say, they do not modify the focal length and aperture data being transmitted to the camera.

However, I think newer versions of these teleconverters have been updated with the ability to modify the data. They are the Kenko TelePlus Pro 300 DGX and apparently the Soligor DGII model, as seen here...

I was thinking to opt for Minolta APO series II 1.4 x but, as far as I know, the latter would not be Ok with lens other than Minolta APO G Series, hence, it would be not Ok with Sigma 400/5.6 mounted on Sony A580 (I use Sigma especially during long trips becuase of its lower weight).

So, what should I do? Do you know if any Sigma 1.4x may work well with Sony digital cameras coupled to either Minolta APO G or Sigma 400/5.6 lens?

... I would like to find a 1.4x that works well with both APO 400/4.5 G lens as well as Sigma 400/5.6 lens when using Sony Alfa580.

The Minolta APO teleconverter will of course work well with the Minolta 400mm. If the rear element of the Sigma lens is recessed (not sticking out), the Minolta teleconverter should work with that one too. How well? I have no idea!

If you're happy with the optical performance of your Soligor teleconverter on both lenses, try to determine if there is a new Soligor or Kenko model made for the Sony mount. (Check Tamron brand as well, because similar products are available from them.) I don't think a new Sony version exists... but if it does it should provide the data adjustment you're looking for.

More info is here on the Kenko website.

Calico Jack Senior Member • Posts: 2,306
Additional advice and suggestions: it's your call

Pip72 wrote:

First of all, many thanks. Well, I'm from Italy. Told that, the price of 1.4x sold by the Scottish selelr is nice. Nevertheless, your reply is very kind yet hugely technical to me, so that, at the very end, I feel confused. So, to be crystal clear, I would like to find a 1.4x that works well with both APO 400/4.5 G lens as well as Sigma 400/5.6 lens when using Sony Alpha 580. I understood, if I am right, that very likely Sigma 1.4x will be not that I am looking for, yet I will try. Minolta 1.4x, the one sold in Scotland and you adviced me, as far as I know, would be not ok on Sigma. Isn't it?

Thanks,

Filippo

Ahoy!

Please see my first reply as it contains ALL you need to know in order to buy and find the correct TC, and as you've stated you also have a Sigma 400/5.6, you'll only get manual focus with that lens because it exceeds F/4.5 which is the maximum aperture that AF will work with a TC, so I would be inclined to forget buying a TC for that lens for the reasons mentioned below.

Sigma TC's are designed to work ONLY with Sigma lenses as the distance between the TC and rear lens element is microscopic thus image quality (IQ) is very well retained with internal focus (IF) lenses because the rear lens element doesn't move.

IMO, you need a Minolta 1.4x APO II for the Minolta AF 400/4.5 APO HS G, and if I had both the Minolta and Sigma, I would sell the Sigma as you've duplicated the focal length so you don't need 2x copies of the same lens type and I'll wager it's nowhere near as good as the Minolta, so I'd be listing it for sale.

You have all relevant links to websites and threads contained therein regarding TC compatibility and what mode(s) you'll retain or not.  It's not that difficult, but it can be harder than you might think to find the correct TC model type, but not all TC are equal anymore than lenses are, but if you have one of the very best tele-primes in the Minolta 400/4.5, it makes absolute sense to get an equally good TC so you don't reduce IQ by using a cheaper or lesser specification TC, but that's where you need to research as there other brands of TC which includes Kenko who are part of Tokina.

In conclusion, teleconverters will not work with all lenses as there are different types (fixed prime and zoom) plus the level of manufacture, number of elements and groups (the more there are the higher the quality) so a TC design is based on what type of lens it can be used with.  So, sell the Sigma 400/5.6 and buy a Minolta 1.4x APO II teleconverter or an equally good alternative brand.

Do the research and concentrate on the Minolta lens.  I wasn't trying to confuse you, but you could end up with multiple TC's and that's not an expense that you need or want.  I hope this makes sense to you now and understand a bit better the reasons for what I'm suggesting and why.

Happy hunting!

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Mark (aka Pirate!)

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OP Pip72 New Member • Posts: 6
Re: 1.4x teleconverter SonyA580

Thank you much, really a crystal clear answer

Filippo

Calico Jack Senior Member • Posts: 2,306
Sigma 1.4x EX DG APO TC (SOLD)

Calico Jack wrote:

Ahoy!

FWIW, I have a Sigma 1.4x EX DG APO that has been endorsed by Sigma to be compatible with HSM lenses and SLT bodies.

Ahoy!

Just to advise my Sigma 1.4x EX DG APO TC has been sold.  It would've been the correct type for Sigma HSM lenses and SLT cameras as it was the updated version.

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Mark (aka Pirate!)

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