Search results for 'sensor cleaning' - page 132
fish eye
That's the Sony owners for you. They can't believe that anybody can use a Sony sensor and get better IQ than Sony. My K110 and K200 both have Sony sensors and both out perform their equivalents. As for th CZ name, they're not as good as they were...:wink:
Posted by Hardgravity on 23/04/2011 - 22:15
Macro Lens Image Sharpness
I don't think it really matters too much. They are two completely different lenses. A macro lens is designed different than a normal lens and the resolution results may not be comparable. The design will be based on the subject being closer to the lens than the film/sensor plane (for lenses that go ...
Posted by Algernon on 26/04/2011 - 13:50
General focusing questions
Having to play with my DA 16-45 and DA 55-300 lately... there are some questions which arise on the focusing in general: 1. The distance scale printed on the lens body itself, do they represent the distance bewteen the focus point and the sensor? 2. If I am trying to focus an object that is be...
Posted by mujirushi on 23/04/2011 - 22:36
Which wide angle lens for a MZ50?
You've got a couple of options IMO: Look for a Pentax 28-80mm auto focus zoom. There are plenty about and all are competent performers. The new DA 35mm f2.4 is a full frame lens and would work on your MZ50, but may not be a wide enough angle for what you want to shoot. Don't buy one of th...
Posted by Dangermouse on 24/04/2011 - 12:55
Which wide angle lens for a MZ50?
Don't buy one of the 18-55mm lenses - they're designed for the smaller digital sensor and will vignette horribly on film. Yes, I agree with DM at very wide angle, but above 24mm it is quite acceptable, worth trying out if you have one already. Regards Peter
Posted by pgweber on 24/04/2011 - 13:15
Fast 28-30mm lens comparison
It's interesting to see that the K28/2 seems to have similar properties to the K28/3.5. Both are sharp wide open, but the f2 naturally opens wider. I have a handful of K lenses (28/3.5, 55/1.8, 120/2.8, 28-50/3.5-4.5 and 85-210/4.5), none of them show their age although the zooms could do with p...
Posted by Dangermouse on 24/04/2011 - 23:35
17-70
Could owners of the 17-70 give me ideas as to what the IQ is like in actual use? My aversion to SDM was what put me off the lens before, but am I correct in thinking that such problems as Pentax had with the tech have been sorted? Not again, just try googling SDM malfunctions for the 17-70, you will...
Posted by Anvh on 25/04/2011 - 18:00
A difficult question
I've had a Chinon 50/1.4 in PK mount which offered respectable IQ and I sold for £30. It is rumoured that the Chinon PK mount lenses were made by Tomioka, who are pretty well respected. The XR Rikenon is believed by some to have been manufactured by Pentax and has a pretty good reputation. The a...
Posted by sorted78 on 27/04/2011 - 05:57
ND filter advice for DA Ltds
I assume your screw ins are soft grads? It's not totally clear from the Hilton website.... APS_C sensor is quite a bit smaller so a soft will be extra soft so a hard GND might be better but you need to find that out for yourself.
Posted by Anvh on 05/05/2011 - 20:19
Old chestnut:- K10D and adaptall 2
I am hoping fellow K10d users can provide me with some assistance. I have some adaptall 2 lenses and k mount that I wish to use, but am growing increasingly confused regarding the metering issues associated with the K10D. The more I read, the muddier the water becomes. Much of the info available see...
Posted by moose on 28/04/2011 - 19:20
Sigma 12mm f/8 fisheye
I recently came by one of these as part of an outfit I bought (for some Takumars): Pictures, samples and info can be found It's a Sigma 12mm f/8 fish eye in T2 mount. I didn't pay much attention to it at the time, as I had read that full frame fish eyes may not be very 'fishy' on a crop s...
Posted by sorted78 on 29/04/2011 - 08:31
Sigma 150-500 DG HSM OS vs 50-500 DG HSM OS
OK after much searching I have been able to answer some of my questions. Focusing, opinions look to be that they both take around the same time to lock on to a subject at infinity from minimum focus distance. They both perform well with regards to accuracy, with the 50-500 having a slight edge...
Posted by toy_car_uk on 03/05/2011 - 12:17
What's the cheapest price wide angle lenses start at?
There aren't a lot of older lenses that wide as before cropped sensors aside from fisheye there wasn't as much need to have anything that was as wide. New the Sigma 10-20 f4-5.6 can still be had for £340 but thats about the cheapest. This a tremendous lens and it stays on my camera as the default w...
Posted by jeallen01 on 10/05/2011 - 22:48
Pentax 28-200 and kr
The K-r is a wonderful camera and if it had the K-5 sensor and was weather resistant I might have gone for that instead of the K-5. However, if it had those features it might well be a K-5 price.
Posted by johnriley on 12/05/2011 - 08:26
Pentax 28-200 and kr
The K-r is a wonderful camera and if it had the K-5 sensor and was weather resistant I might have gone for that instead of the K-5. However, if it had those features it might well be a K-5 price. hey JR it was exactly your review of the kr (I had pretty much dismissed it, as the kx seem like a bette...
Posted by Don on 12/05/2011 - 15:03
Which wide & fast lens...?
I am shooting an Asian wedding in two weeks (just got booked today!) and it will include shots of the Groom before the wedding in his lounge receiving gifts from relatives. Had the room been larger I'd have used my 50mm 1.4 but there's no chance in such a small room on my crop sensor (K20D) I...
Posted by Daydreamjay on 21/05/2011 - 19:52
Fungus
I think it is true to say that UV light helps protect against getting fungus - i.e. let your lenses see the light of day from time to time and do not leave them stuck in drawers for years. However, I have been reading those UV comments for years but so far have never come across anybody who has t...
Posted by fritzthedog on 22/05/2011 - 12:40
Lens Advice...for fun!
I realise that asking for advise is opening up a thousand views and a lens choice is subjective, but just for fun, what do you suggest I buy next? I have a k200d with DA18-55 II kit and DA55-300 and have been browsing the web for my next lens. I did have a FA28-80 F3.5-5.6 and a sigma 70-300 and an ...
Posted by testdasi on 24/05/2011 - 22:03
Lens Formulae
Hi Guys, I've found something else to worry my little grey cells. My K10D 18-55 lens focuses down to 250mm and the specs says this is a magnification of 0.34 with the lens at 55mm. So far so good. I've measured the 250mm to be from the target to just in front of the eyepiece adjustment leve...
Posted by Frogherder on 25/05/2011 - 12:50
Lens Formulae
I was also going to add other queries such as :- "Has the circle of confusion been replaced by a single pixel" but thought better of it regards Bernard Nope, circle of confusion will be at least a couple of pixels wide. Using the "standard" calculation that the circle of confusion is about 0...
Posted by Cuchulainn on 27/05/2011 - 00:10
