Thinking of this lens at DVinfo.net

Randy Johnson · November 13th, 2013, 03:53 PM

Im thinking of this guy

Sigma 28 70mm F 2 8 Zoom Lens for Nikon | eBay
I understand it may not be wide enough for everything but down the road I think id get a Speed booster to widen it up a bit. Right now I can use it with my adapter because it has aperture on the lens. What do you guys think?

Noa Put · November 13th, 2013, 03:59 PM

Thx for the ebay link, I just bought that lens.

Just kidding :) 28-70mm is usable as a general purpose lens but not for too tight spaces, but with a speedbooster attached it will become a very capable lens I think.

Randy Johnson · November 13th, 2013, 04:37 PM

What is the math on the focal length? 28-70 with a speed booster which is .07x would bring it to like 17-50?

Chris Harding · November 13th, 2013, 05:44 PM

I had the one up from this which is the Sigma 24-70 ...the extra couple of mm focal length is very useful but these are quite heavy brutes!! The 24-70 is quite large too with 88mm filters

With your Smart Adapter it looks like it will become a 17-50 lens which is plenty wide enough ..I love my Tamron 17-50 !!

Chris

Randy Johnson · November 13th, 2013, 08:03 PM

yeah I was thinking of just getting the 17-50 but with this I figured 2 things 1. I would get an extra stop and 2. I would be able to have more range in a bigger church just taking off the metabones and using a dumb adapter when needed.

Chris Harding · November 13th, 2013, 09:20 PM

Hi Randy

Only if you have time at a ceremony! I find that once the ceremony is running I dare not even touch the camera!! There is precious little time to start fooling around with lens changes but it will be neat to make that decision at the start and have the options.

Have you already bought the Metabones?? How does it work for you??

Chris

Randy Johnson · November 13th, 2013, 09:57 PM

No I cant make that kind of purchase til early to mid next year to be honest it would be kind of a luxury. The 28-70 at 2.8 is more of a must.

Chris Harding · November 14th, 2013, 03:27 AM

Hi Randy

I find that most times the stock lens is quite adequate in Churches ... if I find I'm hovering at the 21db mark I'll use the 17-50 F2.8 and that works fine with plenty to spare. If I have to pay $600 + for a Metabones then it must be cos I cannot do without it (I could get a nice extra lens for $600!)

Grab the 28-70 and you will find you will have plenty of light unless you film in dark castles like poor Pete!!

I always make sure at the rehearsal if the priest can maybe turn on extra lights for me too .. then your problem goes away !

Chris

Peter Rush · November 14th, 2013, 04:25 AM

Hi Guys - my Canon 24-105mm is a great all rounder for indoor work - goes down to f2.8 with the speedbooster but I've now got the Tamron 24-70mm f2.8 (goes down to 1.8 I think with the speedbooster) for those really dark venues (another castle coming up next month!). It's a great lens and the only short, fast zoom I could find with IS.

The bank is now officially closed now until next season - that Tamron was expensive!!!

Does anyone know how to calculate hyperfocal length taking the focal reducer into account?

Chris Harding · November 14th, 2013, 08:18 AM

Hi Pete

Would this help if you dialled in the camera as a full frame unit at all???

Online Depth of Field Calculator

Or just maybe multiply the aperture by 0.7 and one stop lowerand it should come up with the correct result. A bit too complicated for me but it is a useful calculator!!

Chris

Randy Johnson · November 14th, 2013, 09:13 AM

heres a question can you get auto focus to work with these lenses with the adapter and the NEX 50? or do you need a actual Sony NEX lens for that?

Peter Rush · November 14th, 2013, 10:26 AM

The Metabones EF Speedbooster has limited autofocus for some lenses but Metabones themselves say it is slow and inadequate for most purposes

Sony NEX System : Canon EF Lens to Sony NEX Speed Booster

You would need Sony NEX lenses for autofocus - I use the 16mm f2.8 pancake lens with the 0.6X wide converter - fast autofocus but no IS

I can also recommend the 50mm f1.8 - nice fast autofocus and IS - good for dim environments if you're into primes

Pete

Erik Wittbusch · November 15th, 2013, 11:10 AM

I went deep into my pockets and bought a Speedbooster for Canon EF these days.
Together with a Canon 24-105/4,0L I'll have a 17-75/2,8 with great image stabilization and picture quality.

Okay, neither it's cheap, nor is it small and light or has great AF.
But it's the only way for me to have a one lens option for most of my shooting situations. It's quiet wide, fast and has IS, which helps in handheld situations. The long end of the lens is still fine for interviews and similar things.

I discovered another, much easier option for this as well: The Sigma 17-70/2.8-4 with IS as well on Metabones Smart Adapter. Lighter, cheaper and same technical data.

Another solution would be the new SOny SEL18-105/f4 OSS. It will be around 600 bucks with a very wide focal range, fixed aperture of f4 through the hole range and great OSS image stabilizing. It's not extending it's front element when zooming and has servo zoom capabilities. AF is there too of course. It should be available in december...

http://store.sony.com/e-pz-18-105mm-...pha-NEX-Lenses

Randy Johnson · November 15th, 2013, 02:21 PM

That lens at a 2.8 would be the perfect lens for me I wouldnt need anything else, in fact I kinda wonder if it may be fine for me as is its hard to say the biggest issue I have is losing light when I zoom. I am kinda hoping to buy a lens in the short term because I am hoping that maybe Sony or someone else will release a 17-50 at 2.8 for the NEX so I can keep all my features.

Erik Wittbusch · November 15th, 2013, 02:36 PM

No f2,8 zooms are planned for NEX.

Sony released two new zooms these days: the SEL18-105/4,0 G and the SonyZeiss 16-70/4,0.

If you need f2,8 you need adapted lenses of which the Sigma 17-70/2,8-4,0 seems the most attractive one if you can live with the changing aperture. I still love my new combination. It's exactly what I ever wanted as I don't like the fly-by-wire zooms of the Sony E lenses.

November 13th, 2013, 03:53 PM	#1
Randy Johnson Trustee Join Date: Sep 2007 Location: Newark, Delaware Posts: 1,067	Thinking of this lens Im thinking of this guy Sigma 28 70mm F 2 8 Zoom Lens for Nikon \| eBay I understand it may not be wide enough for everything but down the road I think id get a Speed booster to widen it up a bit. Right now I can use it with my adapter because it has aperture on the lens. What do you guys think?

November 13th, 2013, 03:59 PM	#2
Noa Put Inner Circle Join Date: Jun 2007 Location: Belgium Posts: 9,509	Re: Thinking of this lens Thx for the ebay link, I just bought that lens. Just kidding :) 28-70mm is usable as a general purpose lens but not for too tight spaces, but with a speedbooster attached it will become a very capable lens I think.

November 13th, 2013, 04:37 PM	#3
Randy Johnson Trustee Join Date: Sep 2007 Location: Newark, Delaware Posts: 1,067	Re: Thinking of this lens What is the math on the focal length? 28-70 with a speed booster which is .07x would bring it to like 17-50?

November 13th, 2013, 05:44 PM	#4
Chris Harding Inner Circle Join Date: Jul 2009 Location: Perth, Western Australia Posts: 8,441	Re: Thinking of this lens I had the one up from this which is the Sigma 24-70 ...the extra couple of mm focal length is very useful but these are quite heavy brutes!! The 24-70 is quite large too with 88mm filters With your Smart Adapter it looks like it will become a 17-50 lens which is plenty wide enough ..I love my Tamron 17-50 !! Chris

November 13th, 2013, 08:03 PM	#5
Randy Johnson Trustee Join Date: Sep 2007 Location: Newark, Delaware Posts: 1,067	Re: Thinking of this lens yeah I was thinking of just getting the 17-50 but with this I figured 2 things 1. I would get an extra stop and 2. I would be able to have more range in a bigger church just taking off the metabones and using a dumb adapter when needed.

November 13th, 2013, 09:20 PM	#6
Chris Harding Inner Circle Join Date: Jul 2009 Location: Perth, Western Australia Posts: 8,441	Re: Thinking of this lens Hi Randy Only if you have time at a ceremony! I find that once the ceremony is running I dare not even touch the camera!! There is precious little time to start fooling around with lens changes but it will be neat to make that decision at the start and have the options. Have you already bought the Metabones?? How does it work for you?? Chris

November 13th, 2013, 09:57 PM	#7
Randy Johnson Trustee Join Date: Sep 2007 Location: Newark, Delaware Posts: 1,067	Re: Thinking of this lens No I cant make that kind of purchase til early to mid next year to be honest it would be kind of a luxury. The 28-70 at 2.8 is more of a must.

November 14th, 2013, 03:27 AM	#8
Chris Harding Inner Circle Join Date: Jul 2009 Location: Perth, Western Australia Posts: 8,441	Re: Thinking of this lens Hi Randy I find that most times the stock lens is quite adequate in Churches ... if I find I'm hovering at the 21db mark I'll use the 17-50 F2.8 and that works fine with plenty to spare. If I have to pay $600 + for a Metabones then it must be cos I cannot do without it (I could get a nice extra lens for $600!) Grab the 28-70 and you will find you will have plenty of light unless you film in dark castles like poor Pete!! I always make sure at the rehearsal if the priest can maybe turn on extra lights for me too .. then your problem goes away ! Chris

November 14th, 2013, 04:25 AM	#9
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Thinking of this lens Hi Guys - my Canon 24-105mm is a great all rounder for indoor work - goes down to f2.8 with the speedbooster but I've now got the Tamron 24-70mm f2.8 (goes down to 1.8 I think with the speedbooster) for those really dark venues (another castle coming up next month!). It's a great lens and the only short, fast zoom I could find with IS. The bank is now officially closed now until next season - that Tamron was expensive!!! Does anyone know how to calculate hyperfocal length taking the focal reducer into account?

November 14th, 2013, 08:18 AM	#10
Chris Harding Inner Circle Join Date: Jul 2009 Location: Perth, Western Australia Posts: 8,441	Re: Thinking of this lens Hi Pete Would this help if you dialled in the camera as a full frame unit at all??? Online Depth of Field Calculator Or just maybe multiply the aperture by 0.7 and one stop lowerand it should come up with the correct result. A bit too complicated for me but it is a useful calculator!! Chris

November 14th, 2013, 09:13 AM	#11
Randy Johnson Trustee Join Date: Sep 2007 Location: Newark, Delaware Posts: 1,067	Re: Thinking of this lens heres a question can you get auto focus to work with these lenses with the adapter and the NEX 50? or do you need a actual Sony NEX lens for that?

November 14th, 2013, 10:26 AM	#12
Peter Rush Inner Circle Join Date: Nov 2008 Location: UK/Yorkshire Posts: 2,069	Re: Thinking of this lens The Metabones EF Speedbooster has limited autofocus for some lenses but Metabones themselves say it is slow and inadequate for most purposes Sony NEX System : Canon EF Lens to Sony NEX Speed Booster You would need Sony NEX lenses for autofocus - I use the 16mm f2.8 pancake lens with the 0.6X wide converter - fast autofocus but no IS I can also recommend the 50mm f1.8 - nice fast autofocus and IS - good for dim environments if you're into primes Pete

November 15th, 2013, 11:10 AM	#13
Erik Wittbusch Regular Crew Join Date: Apr 2013 Location: Duisburg Posts: 93	Re: Thinking of this lens I went deep into my pockets and bought a Speedbooster for Canon EF these days. Together with a Canon 24-105/4,0L I'll have a 17-75/2,8 with great image stabilization and picture quality. Okay, neither it's cheap, nor is it small and light or has great AF. But it's the only way for me to have a one lens option for most of my shooting situations. It's quiet wide, fast and has IS, which helps in handheld situations. The long end of the lens is still fine for interviews and similar things. I discovered another, much easier option for this as well: The Sigma 17-70/2.8-4 with IS as well on Metabones Smart Adapter. Lighter, cheaper and same technical data. Another solution would be the new SOny SEL18-105/f4 OSS. It will be around 600 bucks with a very wide focal range, fixed aperture of f4 through the hole range and great OSS image stabilizing. It's not extending it's front element when zooming and has servo zoom capabilities. AF is there too of course. It should be available in december... http://store.sony.com/e-pz-18-105mm-...pha-NEX-Lenses

November 15th, 2013, 02:21 PM	#14
Randy Johnson Trustee Join Date: Sep 2007 Location: Newark, Delaware Posts: 1,067	Re: Thinking of this lens That lens at a 2.8 would be the perfect lens for me I wouldnt need anything else, in fact I kinda wonder if it may be fine for me as is its hard to say the biggest issue I have is losing light when I zoom. I am kinda hoping to buy a lens in the short term because I am hoping that maybe Sony or someone else will release a 17-50 at 2.8 for the NEX so I can keep all my features.

November 15th, 2013, 02:36 PM	#15
Erik Wittbusch Regular Crew Join Date: Apr 2013 Location: Duisburg Posts: 93	Re: Thinking of this lens No f2,8 zooms are planned for NEX. Sony released two new zooms these days: the SEL18-105/4,0 G and the SonyZeiss 16-70/4,0. If you need f2,8 you need adapted lenses of which the Sigma 17-70/2,8-4,0 seems the most attractive one if you can live with the changing aperture. I still love my new combination. It's exactly what I ever wanted as I don't like the fly-by-wire zooms of the Sony E lenses.

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