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PostPosted: Thu Apr 24, 2008 12:39 am 
hi, everybody. my name is whufee, i bought pentax K10D since last xmas, currently i have 18-55 mm, 50mm F1.7 and 50-200mm lens. but would like to purchase a better one for both taking landscape pictures and portraits. any good suggestions ?

next month i am going to a wedding in China, and my friend also ask me to take some photo during the wedding. so which one is the best choice? [would like to buy it asap]. thx very much !!! :lol:


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PostPosted: Thu Apr 24, 2008 5:38 am 
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Joined: Sun May 27, 2007 12:39 pm
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Location: France
Bonjour whufee,

I'm using both lenses and both are very good. There's a real difference of image quality between the DA* lenses and the DA ones.

I reviewed them in :arrow: Pentax DA* 16-50mm f2.8 ED/AL (IF) SDM User Review and :arrow: Pentax DA* 50-135mm f2.8 ED (IF) SDM User Review.

There are two strategies:
  • First strategy, in my opinion, the DA* 50-135mm is more suitable for portraits, with a range of 70-200mm in 35mm equivalent. But that means difficulties for taking pictures in wide angle. Personally, I don't use wide angle for landscapes and 50mm fits my needs.
  • Second strategy, since the 18-55mm is really average or even poor, the DA* 16-50mm will make a real difference. In that case, you rely on the 50-200mm lens for portraits.

Since the aperture of 2.8 for the DA* lenses is a great enhancement and makes shooting without flash and with shake reduction easy, you need to know what's the configuration of the place where's the wedding is going to be. Is it a small room, a large open place? A small room will require a wide angle, a large place could afford a 50mm.

Not an easy choice, indeed :)

Best regards,

_________________
--- rei_vilo
Pentax K-5 + BG4 + DA* 16-50 + DA* 50-135 + DA* 60-250 + AF-540FGZ
reivilophotography.weebly.com


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PostPosted: Thu Apr 24, 2008 4:25 pm 
thx very much rei-vilo, i read your reviews few times, they are very helpful. according to Chinese culture i think it will be held in a big restaurant. i have the 18-55mm lens, not the best one, but it is ok to use indoor.
i think will take picture far from bride so 50-135mm should do a good job. by the way. please tell me the key difference between 50-200m and 50-135mm
the only thing i know is DA star lens has a big aperture. any other advantages?


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PostPosted: Thu Apr 24, 2008 5:14 pm 
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Bonsoir whuffee,

Basically, the DA* lens provides superior quality: less chromatic aberration and crispier images. I reported here :arrow: a comparison between the same pictures taken with the DA lens and DA* lens.

The combination of the lens large aperture f2.8, the K10D shake reduction and high ISO, provides the opportunity to take un-blurred pictures in low-light conditions without flash, so being un-noticed :wink:

Some vignetting (dark corners) may appear at f2.8 but f4 is good enough. Higher ISOs than 800 may result in grainy pictures. I suggest you to pratice shake reduction before the big day since it requires a learning curve .

The ultra-sonic motor built inside the DA* lens provides faster and quieter auto-focus than the DA lens.

I haven't felt to miss the difference between 135mm and 200mm. The 10 M pixels sensor provides wide enough picture to select a crop. The 50-135mm provides enough versatility.

Enjoy :)

_________________
--- rei_vilo
Pentax K-5 + BG4 + DA* 16-50 + DA* 50-135 + DA* 60-250 + AF-540FGZ
reivilophotography.weebly.com


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PostPosted: Fri Apr 25, 2008 10:42 pm 
thanks very much, finally i go for 50-135mm [499GPB] ;)


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PostPosted: Fri Apr 25, 2008 10:50 pm 
by the way, can i use it as a macro lens ?


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PostPosted: Sat Apr 26, 2008 12:35 am 
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Bonsoir whuffee,

Minimum distance is 1 meter / 3 feet.

Macro pictures are possible and shows a nice bokeh. See my pictures :arrow: here, :arrow: there and :arrow: there.

Take great care of the DOF, especially at f2.8 :!: More comments on that point in my :arrow: Pentax DA* 50-135mm f2.8 ED (IF) SDM User Review

Enjoy :)

_________________
--- rei_vilo
Pentax K-5 + BG4 + DA* 16-50 + DA* 50-135 + DA* 60-250 + AF-540FGZ
reivilophotography.weebly.com


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PostPosted: Sat May 03, 2008 8:31 pm 
hi, rei_vilo

one more question for you. can i use Teleconverter for Pentax 50-135MM lens ? if yes which one should i go for ? sigma ?


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PostPosted: Sun May 04, 2008 7:23 am 
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Joined: Sun May 27, 2007 12:39 pm
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Location: France
Bonjour whuffee,

I haven't tried teleconverter so I couldn't answer your question :( . Sorry.

Since DA* SDM lenses are new, check that all the connectors are managed by the teleconverter.

Here's a comparison between DA* and DA. We see: 1 more connector on the outer metal ring and 2 more connectors on the inner dark ring. The screw head for focusing remains in the DA*.

Left, the DA* connector; right, the DA connector
Image
More :arrow: here

Left, the DA connector; right, the DA* connector
Image
More :arrow: here

Best regards,

_________________
--- rei_vilo
Pentax K-5 + BG4 + DA* 16-50 + DA* 50-135 + DA* 60-250 + AF-540FGZ
reivilophotography.weebly.com


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PostPosted: Fri Aug 15, 2008 5:24 pm 
The 50-135mm f2.8 is pretty awesome. We have it in my store, and it is a great piece of kit. Great colors, really sharp, perfect portrait length. Wish NIkon made one like it.


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PostPosted: Sun Aug 17, 2008 3:19 pm 
rei_vilo.. great efforts!! really nice and clear reviews!

I currently have a same kind of problem (well problem ;)).. I have the 18-55 and 50-200.. the last one is very good in good conditions so I will not replace it very soon.. its a bit slow AF but its ok..

I want a lens to use for low light.. in the evening, inside for parties. But as I am a biologist I also want a lens to make good close-ups of lizards, snakes, frogs, insects and maybe some flowers (not my fav thing in biology :wink: ). I also love landscapes and had recently experimented with urban.
I dont know if I should buy a 16-50 (or Sigma 18-50), 50-135 (makes briliant pictures but I dont think I need the focal range, because its not enough for birds and its not a macro) or a macro (Sigma 105mm f2.8 or Tamron 90mm f2.8)

If I choose the macro I would probably buy the 10-20 Sigma later and maybe the 50mm f1.4


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PostPosted: Sat Sep 20, 2008 6:09 pm 
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Bonsoir ro_serpiente,

Sorry for the late answer...

IMHO, keep the 50-200mm (for now) and go for the DA* 16-50mm, perfect for low light (thanks to its 2,8 aperture plus the effective shake reduction) and for macro.

Here are some examples of macro pictures taken with the DA* 16-50mm lens on a K10D:

Image
1/125 f/9 ISO100 34mm

Image
1/45 f/2.8 ISO400 50mm

Image
1/180 f5.6 ISO100 50mm

Image
1/125 f/5.6 ISO100 28mm

Other pictures are :arrow: here. Enjoy :)

_________________
--- rei_vilo
Pentax K-5 + BG4 + DA* 16-50 + DA* 50-135 + DA* 60-250 + AF-540FGZ
reivilophotography.weebly.com


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PostPosted: Sat Sep 20, 2008 8:22 pm 
wow great pictures! thank you!


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