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Forum: General Photography 08-24-2014, 12:44 AM  
Free eBooks on Photography
Posted By interested_observer
Replies: 11
Views: 1,557
Forum: Photographic Industry and Professionals 09-13-2012, 07:08 AM  
Mixed emotions about Pentax lenses development
Posted By ogl
Replies: 23
Views: 2,931
I feel rather mixed emotions about Pentax lenses development...I don't understand - who rules it? Nobody?

I'd like to clear my thought.

1. Well, someday Pentax began to produce DA limited and DA stars lenses - well, it was a good move ... but then it SUDDENLY stopped .
It will be 4 years soon from DA15 and DA*55 release time...No new DA* and DA limited primes in roadmap.
Only first DA limited wide-angle zoom....

2. Pentax SUDDENLY decided to produce two plastic primes . OK. Let it be. But this line of lenses is vague now...
The roadmap is empty. 2013 year are only zooms.

3. WR Zoom was released - well ... rather good center sharpness, comfortable focal range and good DC motor....OK. Lets continue line of WR zooms with DC motor and good price..
Although 18-135 was designed by graduating student of university :)

But DA18-270 is SUDDENLY launched .... NO WR. With SDM and it's $ 800 Tamron.


4. The users were waiting for something like the DA * 300/4, but longer. Not above than $3000-4000. But...
We see DA560/5.6, converted from the telescope with very simple optical formula and for $7000 ... It could be produced DA*400/5.6 (400/4.5) + WR TC 1.4 - cheaper and lighter.

5. Pentax SUDDENLY remade DFA100 macro in WR metal design version - I have it...It's cool. But this idea is died too....



I don't understand logic.... Is there any serious plan or only impulsive rushing of any top-manager?

Is there responsible man for optical engineering?

Pentax was well-known with HQ primes and zooms...
Forum: Pentax SLR Lens Discussion 07-19-2011, 09:40 PM  
Helios 77M-4 MC 50mm F1.8 Have you used this lens?
Posted By Siegfried
Replies: 11
Views: 16,195
Metalwizards,
I've got this lens and have used it a lot. It's about the same biotar as all those helioses having that twisted bokeh wide open, pretty good general contrast and microcontrast (for MC variants, but all H77's came MC'd since they were made in late 80' to mid-late 90's). I've hit the limit for disk space here for my account, so you can refer to this link for photos:

the link

Most of the shots were made with H77M-4MC at f=2.8, only _IGP1293 was shot wide open and some (one or two) landscapes were done at f=8. Check 'aperture' field available under (i) 'info ' -> 'photo data' web-site page controls to confirm whether a shot was made with this lens or Tokina AT-X AF280PRO: if there's a certain aperture reported, then it's Tokina. Otherwise it's H77M4-MC at 2.8 (or 1.8 or 8, see above).

Bottom line: rare, pretty good baby of Helious family, recommended w/o any reservations, fair market price: up to $250USD for a decent copy. N.b.: focus ring goes the other way then one on Pentax, Tokina and Nikon glass: infinity is on the right and MFD is on the left (just like Sigma, Canon, Zeiss; Pentax, Tokina and Nikon have infinity in the left and MFD on the right). Sometimes it's a bit frustrating, but not that much.

Zig

P.S.
When saying smth about FMV I mean it's fair for something to have such price sticker. But probably you'll fail trying to sell it at this price tag since it's public opinion that goes 'I used to see this X at $5-15, you must be nuts asking $150'. I purchased my NOS copy for $150 a couple years ago and I'm pretty happy with it: both price and copy itself.
Forum: Pentax SLR Lens Discussion 06-02-2011, 08:38 PM  
Poll: Should PENTAX make a super-high-speed lens?
Posted By Ash
Replies: 109
Views: 13,811
f/1.2 is certainly fast enough.
Current A 50/1.2s could be redesigned to be a DA* (but more likely a DA ltd since there is already the DA* 55) and there will be a lot of happy Pentaxians around.

But there are still big gaps in the telephoto focal lengths Pentax still has to consider, as limtied as the market is in this area, they do have to find some DA replacements for their previous 400 and 500mm lenses (not many serious shooters will be attracted to a system limited to 300mm of reach with a max aperture of f/4)
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