Which Lens

Road_Dancer
Posted 25/09/2009 - 21:59 Link
chrissinkpen wrote:

Oh- I wondered what the difference between black and silver FA lenses??
The Colour? *whistles innocently and scarpers*
Pentax K10d; Metz mecablitz 48 AF-1; Pentax A 50mm F2; Pentax 18-55mm DAII; Sigma 28-300mm F3.5-5.6; Koboron 24-70mm F3.5-4.8. Pentax MZ-7, Zenit 35mm
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George Lazarette
Posted 25/09/2009 - 23:00 Link
Thordell wrote:
Now it is clear that both of us understand focal length, crop factor and angle of view perhaps it would be best if we drop the subject.
It's quite clear how much you understand from this quote:

"the length quoted is for 35mm cameras and not digital sensors."

G
Keywords: Charming, polite, and generally agreeable.
George Lazarette
Posted 25/09/2009 - 23:06 Link
chrissinkpen wrote:
In my limited experience, it seems prudent to use film lenses if you have film/digital cameras. I presume that digital lenses with their smaller circle of light are limiting in use, in as much that they would not be suitable for full frame digital, therefore you could conclude that film lenses are much more universal in that sense and better value.
I may of course be "barking up the wrong tree", if I am, I'm sure I will know about it

Regards
Chris
That's generally a good argument, but for one thing. APS-C digital sensors are more demanding than film, because the image has to be magnified more. Lenses designed recently therefore tend to be very sharp. They are sharper than most previous lenses, other than the best.

Having said that, most of my lenses are good film-era lenses, and I have no complaints. It's just a matter of choosing wisely.

G
Keywords: Charming, polite, and generally agreeable.
hefty1
Posted 26/09/2009 - 00:43 Link
chrissinkpen wrote:
Oh- I wondered what the difference between black and silver FA lenses??
The silver ones take better pictures. This is due to them not being anodized silver as is widely thought, but rather coated with a very special layer of magic fairy dust - ask any owner
Joining the Q
Edited by hefty1: 26/09/2009 - 00:45
hefty1
Posted 26/09/2009 - 00:54 Link
And I agree with George that modern lenses in general are sharper than their film era counterparts.

I wouldn't recommend buying older lenses in the hope that Pentax will be releasing a FF DSLR at any point (they won't), however, I would say they're worthwhile if you intend using them on an old film camera or if you're offered a few cheap and fancy giving them a try. If your only cameras are likely to be the current digital models though there are very few film-era lenses that make a compelling argument for themselves against their DA equivalents.
Joining the Q
ManixZero
Posted 26/09/2009 - 01:33 Link
I know nothing but --- I understood that CCD and CMOS sensors were much more sensitive to the angle at which the light strikes the film/sensor than good ole 35mm film.

Therefore DA or DI or whatever the designation - the inherent design was to ensure that the light always arrive at the film/sensor plane perpendicular to the plane??

I might be talking a load of boll""ks but in practice it doesn't seem to matter that much. Which is why Tamron and Sigma have just re-badged their lenses rather than re designed them

anyway as long as you get the image you want from the kit you have the name on the front is just a name on the front!

Cheerz MZ
K5, K7, Nikon FA.
AF Lenses: DA15mm Ltd, DA21mm Limited, DA35mmAL, DA50mm f1.8, DA18-55mmWR, FA28-70mm f4AL, DA50-200mmWR,Tamron SP70-200mm f2.8, AF70-300mm LD Di, SP10-24mm, SP90mm Macro.
MF Lenses: SMC-A 50mm, Adaptall 24mm(CW-24), 135mm(03B), 35-70mm(17A) 80-210mm(03A), Micro-Nikkor55mm, Soligor I-S 200mm f2.8 AIS

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chrissinkpen
Posted 26/09/2009 - 09:02 Link
The black FA lenses I have handled seem much heavier in construction, compared to the silver equivalent's.Can I assume then that they produced silver lenses to compliment siver bodies
Thanks all for your response,I'm making sense of things slowly.

Regards

Chris
Clarky
Posted 26/09/2009 - 09:08 Link
hefty1 wrote:
chrissinkpen wrote:
Oh- I wondered what the difference between black and silver FA lenses??
The silver ones take better pictures. This is due to them not being anodized silver as is widely thought, but rather coated with a very special layer of magic fairy dust - ask any owner
Is that what that is !! I keep trying to brush it off,
Camera:|K-7|
Pentax Lenses:|DA12-24/f4 ED AL|DA35Ltd Macro|FA31Ltd|FA77Ltd|FA50/1.4|F70-210|FA20-35 f4/AL|A*200/f4 Macro ED|A50/1.7|A50 Macro f2.8|1.7xAF adapter|
Voigtlander|125/f2.5SL Macro APO Lanthar|
Sigma Lenses:|EX DG 100-300 f4|2X & 1.4X TC|
Flashes:|AF540FGZx2|RingFlash AF160FC|
chrissinkpen
Posted 26/09/2009 - 09:19 Link
So, from what I gather so far, modern digital lenses are, in the main "better", just out of interest, which camp does the FA50f1.4 fit into??
Well perhaps I should of ommitted a smilie when asking the question about silver/black FA lenses seriously though,it was and remains a genuine question.:idea
Regards

Chris
George Lazarette
Posted 26/09/2009 - 15:24 Link
Many older lenses were designed, fortuitously, to present the light to the film at close to 90 degrees, so they work fine on digital. In my experience, most older Pentax lenses work well, which is why I still use several.

However, the ones I use were all very highly regarded in their day, and are all very sharp. So, buy wisely, as I said.

G
Keywords: Charming, polite, and generally agreeable.
Edited by George Lazarette: 26/09/2009 - 15:24
johnriley
Posted 26/09/2009 - 15:43 Link
Quote:
The black FA lenses I have handled seem much heavier in construction, compared to the silver equivalent's.Can I assume then that they produced silver lenses to compliment siver bodies
Thanks all for your response,I'm making sense of things slowly.
There are many different types of FA lenses. Early ones had lots of metal construction under the plastic exterior and some of them can be quite heavy.

Later ones can be split into two types. The first type are "consumer" lenses such as many of the 28-80mm and 28-90mm ones and they are relatively light whether silver or black. It's still all plastic!

The "pro" lenses such as the Limited range are made of metal again and whether silver or black are still metal and rather heavier. But the colour doesn't affect things.

Hope that helps to clarify things!
Best regards, John
George Lazarette
Posted 26/09/2009 - 15:49 Link
If shooting in the desert, take a silver lens; in the Arctic, take a black.

The silver will reflect light in the desert, and keep the lens cool. The black will absorb light in the Arctic and warm the lens slightly.

I keep two of everything, and choose according to my itinerary.

G

PS: I got Peter Mandelson to write the last line.
Keywords: Charming, polite, and generally agreeable.
chrissinkpen
Posted 26/09/2009 - 17:28 Link
Thanks John for that information.
Does my FA50F1.4 sit in the consumer list? or is this the last of the film lenses that are equal in quality to digital lenses.
George,I don't shoot in the desert or the arctic but if I do I will heed your advice.

Regards

Chris
johnriley
Posted 26/09/2009 - 17:34 Link
The FA 50mm f1.4 belongs to the earlier group and I suppose is the last of the original FA film lenses. It's optically the same as the M series lens as far as I know, so its pedigree is a long one.

The only note of caution I would sound is that I don't agree with the statement the film lenses that are equal in quality to digital lenses. - that's not really the point.

Lots of the later lenses are equal in quality to the earlier ones, despite being manufactured in a different way.

For the purposes of digital photography some (not all) film lenses will be less suitable, that's true, but it's not necessarily related to which group of film lenses they belong to.
Best regards, John
philstaff
Posted 29/09/2009 - 21:57 Link
George Lazarette wrote:
Many older lenses were designed, fortuitously, to present the light to the film at close to 90 degrees, so they work fine on digital. In my experience, most older Pentax lenses work well, which is why I still use several.

However, the ones I use were all very highly regarded in their day, and are all very sharp. So, buy wisely, as I said.

G
So what are the better older lenses in your opinion George. I ask as I know a shop who will have a selection comming in shortly.
Ian

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