Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
07-03-2013, 07:51 AM   #106
Pentaxian
Sagitta's Avatar

Join Date: Feb 2011
Location: Maine
Photos: Gallery
Posts: 2,937
QuoteOriginally posted by mrNewt Quote
I don't understand the negative feedback for manual lenses... I work with nothing but manual lenses and don't have any complains.
Manual lenses are very fast to use if you know what you are doing.

Also, remember, just because you can't work with a manual lens, it doesn't mean is bad and it should be avoided...

I doubt there is a lens that you should avoid... each can have a purpose and don't forget... best lens is the one you have with you.

In the end is a matter of how willing you are to learn a specific lens and to know when to use it.

Even the worst quality glass can still be useful in more creative images or for a beginner that just wants to learn and image quality is not an issue yet.
I love my clunky old manuals. That said, when I hit a dog of a lens, I *know* its a dog. When I picked up my Pentax-M50 1.4, it had two tagalongs - a Soligor 28-80 C/D and a Promaster 85-210. Maybe those two lenses were nice at one time, but by the time they landed in my mailbox they basically are at what I'd consider 'junk' status. The Promaster actually crunches when I try focusing, probably due to parts from the completely sloppy aperture ring being ground up somehow or something.

The Soligor has potential, but its so awkward to do anything with its not worth the effort IMHO. It does have some really bizarroland bokeh though.




07-03-2013, 10:09 AM   #107
Veteran Member
mrNewt's Avatar

Join Date: Nov 2011
Location: ON, RH
Posts: 2,170
QuoteOriginally posted by bdery Quote
I didn't get the vibe that manual lenses ought to be avoided by reading the thread. In any case, I agree they are fine, just like most lenses...
Reading the thread I slightly got that vibe... but it could be just me I guess .

QuoteOriginally posted by Sagitta Quote
I love my clunky old manuals. That said, when I hit a dog of a lens, I *know* its a dog. When I picked up my Pentax-M50 1.4, it had two tagalongs - a Soligor 28-80 C/D and a Promaster 85-210. Maybe those two lenses were nice at one time, but by the time they landed in my mailbox they basically are at what I'd consider 'junk' status. The Promaster actually crunches when I try focusing, probably due to parts from the completely sloppy aperture ring being ground up somehow or something.

The Soligor has potential, but its so awkward to do anything with its not worth the effort IMHO. It does have some really bizarroland bokeh though.
Sort of a like that bokeh in the violet color - is frosty .

When something is damaged, you can't do much about it.
The only down side I would see with older lenses is that time might of got to them... and some might need some servicing. This usually depends a lot on previous owners.
Some could be saved for almost nothing especially if you have a little bit of knowledge on how to. Some can only become organ donors or hit/miss experiments.

That's why I usually recommend to buy old lenses only if they are in good condition from respectable sellers OR only if you can inspect them in person.
An old lens for $100-$200 vs a new lens for double the amount (or triple sometimes) that give the same results (sometimes even worse)... I would go old school anytime of the day .

But in the end, each has their own needs and that can never be argued - I respect that.
I guess my final message would be: "Don't discard something and call it bad just because you can't, don't need or don't want to use it."

Last edited by mrNewt; 07-03-2013 at 10:15 AM.
07-03-2013, 10:44 AM   #108
Forum Member




Join Date: Nov 2011
Location: Upper Arlington, OH
Photos: Gallery | Albums
Posts: 82
The 2 worst lenses I've ever used were the Pentax-F 80-200mm f4.7-5.6 and a Sigma 28-80mm f/3.5-5.6. The Pentax was definitely a beat up, bargain-condition lens, but there was nothing to indicate it was ever a good performer. The Sigma was crap straight out of the box. I sold them as soon as I could. I'm really happy with the assortment I have now!
07-03-2013, 11:39 AM   #109
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,264
QuoteOriginally posted by bdery Quote
In addition, if the problem is limited to the 50 f1,7
It isn't. The design is common in A-series lenses and is not related to age per se. Poor materials choice + poor design ==> failure.

I would not (and did not) say that all lenses made after the M-series are poor choices for purchase. What I did say is that most of the current product is not particularly well-made. I will go further in saying that things are worse in the land of the Canikonians.


Steve

07-03-2013, 11:40 AM   #110
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,264
QuoteOriginally posted by wildman Quote
That is a statement not a question.
And your point is?

I guess this nixes my marks for the quarter, eh?


Steve

(Oops! Did it again!)
07-03-2013, 11:56 AM   #111
Veteran Member




Join Date: Mar 2007
Location: Alexandria VA USA
Posts: 315
Pentax made a non-SMC zoom in the 80's that bit the big one. It was a 28-80mm zoom sold under "Cosmicar" or "Takumar-A". Unpleasantly soft throughout. Here's a link to the lens' page -

MC Cosmicar 28-80/3.5-4.5

Note the photo in the link is mine.

I gave the lens away along with my old film camera bodies - I couldn't, in good conscience, sell the lens to anyone.

Last edited by Rob22315; 07-03-2013 at 12:21 PM.
07-03-2013, 12:11 PM   #112
Site Supporter
Jean Poitiers's Avatar

Join Date: Apr 2011
Location: Lost in translation ...
Photos: Gallery | Albums
Posts: 16,502
QuoteOriginally posted by Rob22315 Quote
Pentax made a non-SMC zoom in the 80's that bit the big one. It was a 28-80mm zoom sold under "Cosmicar" or "Takumar-A". Here's a link to the lens' page ... I couldn't, in good conscience, sell the lens to anyone.
Yep, this one is no good unless you need a paperweight as a discussion piece ... J
07-03-2013, 12:18 PM   #113
Veteran Member




Join Date: Mar 2007
Location: Alexandria VA USA
Posts: 315
QuoteOriginally posted by stevebrot Quote
My pleasure. Many of the A-series lenses, the 50/1.7 in particular, suffer from a weakness in a plastic part in the aperture ring mechanism. This small part breaks resulting in a partial or total freeze of the aperture ring. This is not a huge issue if you always use it on a camera with dial-controlled aperture for Av mode and never take the lens off the "A" setting. It can be a problem if you use it on, say, a Pentax Super Program in Av mode where you have to use the aperture ring and can't get it back to the "A" setting for use on the dSLR. Probably at least half the A 50/1.7 lenses out there have this problem. I read a comment some years back on this site that even if your A 50/1.7 is good, it is only a matter of time before this part gives out. Fortunately I have the optically equivalent and much better built Pentax-M 50/1.7 to use instead on my film cameras.


Steve
I own this lens and it's still fully functional so this is a great tip - I'm never taking it off 'A'. Same for all my other 'A' lenses. Fortunately, both my DSLR and my K-01 give me aperture control in the camera so i don't need it on the lens. Thanks

07-03-2013, 10:36 PM   #114
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 5,299
QuoteOriginally posted by bdery Quote
That's interesting, but it relates to a lens line that's quite old. Newer lines don't appear to have this problem, I believe. In addition, if the problem is limited to the 50 f1,7, it's much more likely to be a design flaw than anything else. Deciding that all lens lines newer than the M are rubbish that won't last based on the impression that 50 f1,7 lenses are less reliable is quite a stretch.
The newer AF lenses were built to a different standard.

The cost of using an all metal design was too expensive, so more plastic was used. Same goes for the Pentax cameras, less metal parts and more plastic.

The earlier MF lenses have proven they can last 40 years and thatís why so many are still in use.

The newer AF lenses do not have that track record. There are more things that can go wrong with a newer AF lens, so in 2050 weíll see how many DAís are still working. Iíll bet you there are more Taks, Kís and Mís still in use in 2050 than DA's.

Phil.
07-04-2013, 12:46 AM   #115
Pentaxian
Digitalis's Avatar

Join Date: Mar 2009
Location: Adelaide.
Posts: 8,739
The sigma 30mm f/1.4 EX DG springs to mind. There are also certain Pentax FA 28-80mm cheap zoom lenses lenses that should be avoided.
07-04-2013, 03:07 AM - 1 Like   #116
Senior Member




Join Date: Jul 2011
Location: Indiana
Posts: 170
I have an offer for everyone who has these so called "useless" len's. Just PM me and you all can send them to me. I will proudly use them and post the results. Provided I keep all useless and not wanted lens. I may even pay the postage.

Just don't send broken or junk non working ones, I got enough of those.

Who knows, I may even get my first photo in the PPG with a lens no one wants.
07-04-2013, 05:12 AM   #117
Pentaxian
bdery's Avatar

Join Date: Mar 2008
Location: Quebec city, Canada
Photos: Gallery
Posts: 5,798
QuoteOriginally posted by gofour3 Quote
The newer AF lenses were built to a different standard.
Likely better

QuoteOriginally posted by gofour3 Quote
The cost of using an all metal design was too expensive, so more plastic was used. Same goes for the Pentax cameras, less metal parts and more plastic.
As I said before, that doesn't mean they are more cheaply made.

QuoteOriginally posted by gofour3 Quote
The earlier MF lenses have proven they can last 40 years and that’s why so many are still in use.

The newer AF lenses do not have that track record. There are more things that can go wrong with a newer AF lens, so in 2050 we’ll see how many DA’s are still working. I’ll bet you there are more Taks, K’s and M’s still in use in 2050 than DA's.
1-you cannot blame a newer lenses for not yet having lasted a long time...

2-It's clear, and we agree, that more components increase the likeliness of failure. However, what's been added is the PCB (not likely to fail), AF gear (not likely to fail) and aperture control (somewhat more likely to fail). If you add SDM, then we'll see, the newer versions are just that, really new. I'm willing to bet that if you exclude the aperture ring, everything that "works" on a K or M will still work with a DA Which is zoom, focus and let light through.
07-04-2013, 05:16 AM   #118
Site Supporter
Jean Poitiers's Avatar

Join Date: Apr 2011
Location: Lost in translation ...
Photos: Gallery | Albums
Posts: 16,502
My worst "fast fifty" ...

07-04-2013, 05:35 AM   #119
Site Supporter




Join Date: Jan 2010
Location: Michigan
Photos: Gallery
Posts: 2,167
The ap rings on all the -A lenses here are all rough feeling and not as smooth as the -M lenses which are consistently good
All except the SMC Pentax -A 1:1.4 50mm which has a better feel, smoother and tighter than all the other -A lenses
I don't have many zooms but all the -A ones have loose focus mechanisms and the ends wobble. the looseness is a worry for holding focus but the end wobble does not seem to affect the image.
On the other hand the only -M zoom here is the SMC Pentax -M 1:2.8~4 40~80mm which is smooth and tight. Actually I like this lens on the MX, it is brighter for focus with the split ring than the slower -A zooms.
So I much prefer the -M lenses over the -A.

Incidentally I have a SMC Pentax -M 1:2.8 24mm which had heavy use before i got it. It has some cosmetic wear, White spots are visible on one of the inner elements in front group, and it shows in the images as loss of sharpness and contrast. The diaphragm is sluggish, not snappy, so it does not stop down below about f/8 and the filter thread is slightly distorted.
Is it worth trying to get this one repaired?
07-04-2013, 09:05 AM - 1 Like   #120
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 27,264
QuoteOriginally posted by bdery Quote
...Likely better...


...As I said before, that doesn't mean they are more cheaply made.
Whatever...I guess I am old school. If it looks cheaply made and feels cheaply made, chances are it is cheaply made.


Steve
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
k-mount, lenses, matter, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
No matter what a staffer says, they can't make you delete photos MRRiley Photographic Industry and Professionals 7 03-14-2013 03:09 PM
What lenses should stay, which should go? grimmy2016 Pentax K-r 14 07-18-2012 06:11 PM
New PF Style- Which color should be default? Adam General Talk 161 08-01-2011 10:49 PM
Misc No matter what. Never give up . . . shine your light . . . Petermgr Post Your Photos! 9 02-06-2010 09:45 PM
Which shot should be printed? bwield Post Your Photos! 14 10-07-2008 01:15 PM



All times are GMT -7. The time now is 02:22 PM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top