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Sigma 105mm F2.8 EX and EX DG Macros

Sharpness 
 9.8
Aberrations 
 9.3
Bokeh 
 9.3
Handling 
 8.9
Value 
 9.6
Reviews Views Date of last review
37 98,521 Sat December 30, 2017
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Recommended By Average Price Average User Rating
100% of reviewers $342.60 9.42
Sigma 105mm F2.8 EX and EX DG Macros

Sigma 105mm F2.8 EX and EX DG Macros
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Sigma 105mm F2.8 EX and EX DG Macros
supersize
Sigma 105mm F2.8 EX and EX DG Macros
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Description:
Versatile 1:1 macro lens - aperture ring and non crippled K-mount means it can be used on the full range of legacy film and modern digital bodies. There are two nearly identical (externally) versions: the EX-DG, and the earlier EX. These are optically distinct, see specs., the DG was a revision of the EX for digital, with attention to eg sensor reflection.
This lens uses a 2-step combination of a push/pull clutch and an AF/MF switch to select the desired focus mode - this is what Sigma calls their DF (Dual Focus) System. The focus ring is pushed forward or pulled backward to disengage/engage the manual focus mechanism. In the forward AF position, the focus ring turns freely but does nothing and AF does not cause the ring to turn. In the rear MF position, the manual focus mechanism is engaged. Because the focus ring moves in relation to the markings, 2 sets of macro markings are needed. The white are for use during AF and the yellow are for use during MF.
Lens has a focus limiter switch to reduce hunting, restricts to cfd 0.4m/1.3' (1:2). Flick to full for 1:1.

Weight: 457g/16.1 oz.
Length: 97.5mm/3.8 in.
Filter Diameter: 58mm, screw thread only for hood/filter.
Min. Focus: 31.3cm/12.3 in.
Minimum working distance (ie from lens end): 12.2cm/4.8 in
IF - lens extends but front group does not rotate.
Focus throw (manual focus): ~270deg
Max. Magnification: 1:1
Horizontal FOV: 23.3 degrees
Horizontal FOV on Digital: 15.5 degrees
Aperture range f2.8 - f32 (PENTAX).
Effective max aperture: f/4.2 at a 1:2; f/5.5 at 1:1
Iris: 8 blades
Optical Construction: 11 Elements in 10 Groups (EX-DG), 10 elements in 9 groups (EX).

Succeeded by Sigma 105mm EX DG OS HSM Macro

Shutterbug review of EX version here.
DIY lens hood.
Mount Type: Pentax KAF2/KAF (screwdrive AF)
Price History:



Add Review of Sigma 105mm F2.8 EX and EX DG Macros
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Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-15 of 37
New Member

Registered: September, 2011
Posts: 2
Lens Review Date: December 30, 2017 I can recommend this lens: Yes | Price: $210.00 | Rating: N/A 

 
Pros:
Cons:
Value: 10    Camera Used: K20d    New Or Used: 10   

Just bought this lens for 175 on a Dutch secondhand site. It is the DG EX version. Not yet taken any shots with it only some indoor trials. Seems sharp. Further info/photo's will follow when being used.
   
Senior Member

Registered: December, 2012
Location: Twin Cities
Posts: 130
Lens Review Date: December 23, 2016 I can recommend this lens: Yes | Price: $200.00 | Rating: 10 

 
Pros: Sharp fast excellent construction and good looks
Cons: Front hood not reversible
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 10    Value: 10    Camera Used: K-30, K-1    New Or Used: 10   

It's superb on the K-30. BUT on the K-1 autofocus buzzes only does not do anything
   
Site Supporter

Registered: May, 2013
Location: SW Ontario, Canada (ex-pat Brit)
Posts: 1,103

1 user found this helpful
Lens Review Date: October 10, 2016 I can recommend this lens: Yes | Price: $399.00 | Rating: 9 

 
Pros: Sharpness, colour, bokeh
Cons: lens hood
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 9    Value: 10    Camera Used: K-30   

I can agree 100% with all the other reviews of this lens in terms of the quality of the images it produces. I picked mine up on Ebay as 'new old stock' (NOS) and it had been sitting in a store display cabinet until the store closed down and the stock was sold to a liquidator. It even came with a Sigma 7 year extended warranty.

The focus range limiter is extremely useful and it's easy to focus both in AF and manual modes although AF can be a bit noisy especially if you are trying to get up close to a bug.

Many of the other reviews have mentioned the hood as a con but the fact is that the front element is set so far back in the body that the hood is only really needed if you are outside and facing into the sun. For indoor macro work I never use the hood at all. Another small niggle with the hood is that the depth makes it difficult to get the lens cap on or off. I have very long fingers and it can still be tricky at times. I purchased a generic cap that will clip into the end of the hood so now I have the original cap for normal use and a larger cap for use with the hood. I keep the generic cap in a cloth pouch in the Sigma lens case so it's always with the lens and available as required.

Here are a few examples taken while testing both the lens and my light tent I acquired at the same time and some outdoor shots.











   
New Member

Registered: August, 2014
Location: Palm Beach, Fl
Posts: 4
Lens Review Date: April 2, 2016 I can recommend this lens: Yes | Price: $179.00 | Rating: 9 

 
Pros: Bokeh, Color rendition, Just... Wow!
Cons: AF, AF to manual switch
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 7    Value: 9    Camera Used: K3   

I have the EX version. This lens can take some spectacular macros. Overall very satisfied with the results it can produce. If you can find one, get it! Mine came from Japan via eBay. My only gripe is that the auto focus hunts a little. Most macros are used in manual focus anyway, so not to big of a gripe. The second issue is the auto to manual focus switch. It uses the focusing ring in the forward to backward position to switch between auto and manual. Turn the ring a certain way and you switch to manual or auto by accident. It becomes a problem since i would also need to change to manual on the camera body (K3). That being said, I can easily overlook the previously mentioned issues because this lens can help anyone create phenomenal macros. Currently my second favorite lens.

https://www.flickr.com/photos/60236600@N02/23936860656/in/dateposted-public/
https://www.flickr.com/photos/60236600@N02/23790288506/in/dateposted-public/
https://www.flickr.com/photos/60236600@N02/23733920181/in/dateposted-public/
https://www.flickr.com/photos/60236600@N02/23832034839/in/dateposted-public/
   
Forum Member

Registered: March, 2010
Location: Sfantu Gheorghe, Romania
Posts: 61
Lens Review Date: February 9, 2016 I can recommend this lens: Yes | Price: $250.00 | Rating: 10 

 
Pros: Sharp, bokeh, colors, macro
Cons: None
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 9    Value: 9    Camera Used: Pentax K-x   

My most used lens and the one that puts a big smile on my face! It changed my photography and made me creative and I always feel a big joy using this marvellous lens. It has beautiful bokeh, crazy sharpness, wonderful colors, zero aberations and it can be used wide open for beautiful portraits!
   
Site Supporter

Registered: June, 2013
Location: Montreal, Canada
Posts: 397

1 user found this helpful
Lens Review Date: July 22, 2015 I can recommend this lens: Yes | Price: $300.00 | Rating: 9 

 
Pros: Very sharp, very low ca considering no ED glass,
Cons: none
Sharpness: 10    Aberrations: 9    Bokeh: 9    Handling: 9    Value: 10    Camera Used: K-30   

It's weird to shoot the stars with a macro lens but stars show a lens defects so well i think it's worth it. Mine is the EX DG

In the image below, taken fully open at f/2.8, (click for full res) you can see the stars in the corner are almost as sharp as those in the center. Just a tiny bit of coma. CA is also well controlled as very few stars show blue or orange halos and those halos remain relatively small. I think that's remarkable for a lens w/o ED glass.

   
Inactive Account

Registered: June, 2009
Location: Berlin
Posts: 103

1 user found this helpful
Lens Review Date: July 28, 2014 I can recommend this lens: Yes | Price: None indicated | Rating: 10 

 
Pros: Compact, great image quality
Cons: Hood (fastened on the 49mm thread)
Sharpness: 10    Aberrations: 10    Bokeh: 9    Handling: 9    Value: 10    Camera Used: K5   

Solid lens, compact lens. great image quality.
Aperture control ring makes it suitable also for old SLRs.
The hood is a hassle to use: It screws onto the 49mm thread and tends to unmount any filter that is placed in-between.
   
Senior Member

Registered: September, 2013
Posts: 273

1 user found this helpful
Lens Review Date: June 1, 2014 I can recommend this lens: Yes | Price: $250.00 | Rating: 9 

 
Pros: IQ, sharpness, build quality, limiter switch
Cons: kinda slow going through whole range
Sharpness: 9    Aberrations: 9    Bokeh: 9    Handling: 9    Value: 10    Camera Used: k5iis   

Recently acquired this great lens. I am quite pleased with it from all angles. I yet to really put to the test with macro, but what I have done has been very nice. Bought more for a med telephoto and in that regard it has more than satisfied. Found this one on Evilbay for $250 and was well worth the price
   
Forum Member

Registered: August, 2011
Location: Slovenia
Posts: 73

1 user found this helpful
Lens Review Date: February 21, 2014 I can recommend this lens: Yes | Price: $330.00 | Rating: 9 

 
Pros: Sharpness, colour, CA control
Cons: Weird AF/MF switch
Sharpness: 10    Aberrations: 9    Bokeh: 8    Handling: 9    Value: 9    Camera Used: K-7, K-5   

Biting sharpness and nice natural colours are main strong points of this lens along with great CA and flare control. I really enjoy using it and it's one of my main tools in the field.

The only slight negative things are the weird AF/MF switch (which in the end does make sense) and a deeply recessed front element - hard to clean, but safe.

   
New Member

Registered: January, 2014
Posts: 1

1 user found this helpful
Lens Review Date: January 2, 2014 I can recommend this lens: Yes | Price: $300.00 | Rating: 10 

 
Pros: TACK SHARP, no CA
Cons: Nothing...really
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10   

This is an excellent lens without any visible optical flaws. AF on K200d was slow but on K-5 is pretty fast and precise. It has aperture ring so it's working very well on old bodies.
   
Site Supporter

Registered: December, 2012
Location: Kristiansand S
Posts: 204

1 user found this helpful
Lens Review Date: August 18, 2013 I can recommend this lens: Yes | Price: $500.00 | Rating: 10 

 
Pros: Sharp, Bokeh
Cons: Noisy
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 8    Value: 10   

Just one thing to say: Fantastic Sharp!
   
New Member

Registered: November, 2012
Posts: 6

1 user found this helpful
Lens Review Date: May 23, 2013 I can recommend this lens: Yes | Price: $200.00 | Rating: 9 

 
Pros: Sharp
Cons: Noisy AF
Sharpness: 9    Aberrations: 8    Bokeh: 9    Handling: 7    Value: 9   

Excellent Lens for macro. Evaluated Pentax 100mm and 105 Sigma went ahead with Sigma for Sharpness, price.

http://www.flickr.com/photos/52439029@N07/8776054117/
http://www.flickr.com/photos/52439029@N07/8782597374/in/photostream/
http://www.flickr.com/photos/52439029@N07/8776020087/
http://www.flickr.com/photos/52439029@N07/8776020311/in/photostream/
   
Junior Member

Registered: December, 2011
Posts: 44

2 users found this helpful
Lens Review Date: May 14, 2013 I can recommend this lens: Yes | Price: $300.00 | Rating: 10 

 
Pros: Super Sharp, Great Colors, Great Bokeh, Built Very Well
Cons: Some PF When Not Used As Macro, Focus Is Useless For Macro(not big deal)
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 10    Value: 10   

I purchased this lens a few months back from a member here on the forum. At the time of purchase i was actively looking for a good Macro lens and i had done plenty of research here on the forum as well as other places. I had my choices narrowed down to this lens and the FA 100mm Macro. The deciding factor was going to be which lens came available at a price that i couldnt pass up. To be honest i really wanted the FA 100 but all the ones i saw for sale were priced more than i wanted to go. This lens popped up at $300 so i jumped on it and i have not been disappointed in the least.

I am still learning how to use this lens properly but i find myself playing with it all the time. My photos are improving everytime i go out with it. When used for Macro this lens is super sharp! Like i say, i'm still learning to use this lens but the sharpness i'm getting is just amazing. It gives great all around image quality. Colors are pretty much right on and the bokeh is beautiful.

Only negatives i can say about this lens is #1 - when shooting macro the focus is pretty much useless. It has a lot of travel even when limited. This isnt a big deal for me because i knew up front that i would be using it as a manual. I tend to have it on an extension tube quite often so focus is eliminated regardless. #2 - I do notice some Purple Fringe when using the lens for other than macro. You can see what i mean in the last photo if you look at the cats right ear. This can be corrected in photoshop very easily and otherwise the lens is still spot on.

All and all i am very happy with my purchase and would definitly recommend this lens to anybody thinking about buying it.



















   
Forum Member

Registered: May, 2012
Location: Antigonish, Co. NS, Canada
Posts: 60

2 users found this helpful
Lens Review Date: April 9, 2013 I can recommend this lens: Yes | Price: $300.00 | Rating: 10 

 
Pros: sharp from F2.8 build quality
Cons: Lens hood needs rethinking
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 10    Value: 10   

I hadn't planned on buying this lens; when I heard the price of 300.00$ for it new, it was hard to turn down. Someone had ordered it and never picked it up; that is their loss.
   
Junior Member

Registered: January, 2013
Location: Texas
Posts: 32

1 user found this helpful
Lens Review Date: January 5, 2013 I can recommend this lens: Yes | Price: None indicated | Rating: 9 

 
Pros: Unbelievable sharpness, manual focus
Cons: Inconvenient hood and aperture ring
Sharpness: 10    Aberrations: 10    Bokeh: 10    Handling: 9    Value: 9   

Sharp, sharp, sharp! No distortion, low flare, sharp at all distance, sharp at all apertures, and sharp!

The aperture ring is too recessed, near the camera body: difficult to use, even with my thin fingers.
Add Review of Sigma 105mm F2.8 EX and EX DG Macros



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